diff --git a/api/mutations/community/updateAdministratorEmail.js b/api/mutations/community/updateAdministratorEmail.js
index 3758b60d93..6a3808a3b4 100644
--- a/api/mutations/community/updateAdministratorEmail.js
+++ b/api/mutations/community/updateAdministratorEmail.js
@@ -20,7 +20,7 @@ export default requireAuth(async (_: any, args: Input, ctx: GraphQLContext) => {
   const { id: communityId, email } = args.input;
   const { loaders, user } = ctx;
 
-  if (!isEmail(email)) {
+  if (!email || !isEmail(email)) {
     return new UserError('Please enter a working email address');
   }
 
diff --git a/api/mutations/message/addMessage.js b/api/mutations/message/addMessage.js
index 0ba4306cd6..cfbb1d4fcb 100644
--- a/api/mutations/message/addMessage.js
+++ b/api/mutations/message/addMessage.js
@@ -203,7 +203,7 @@ export default requireAuth(async (_: any, args: Input, ctx: GraphQLContext) => {
   // at this point we are only dealing with thread messages
   const thread = await loaders.thread.load(message.threadId);
 
-  if (thread.isDeleted) {
+  if (!thread || thread.deletedAt) {
     trackQueue.add({
       userId: user.id,
       event: eventFailed,
diff --git a/athena/queues/private-channel-request-approved.js b/athena/queues/private-channel-request-approved.js
index e9867428b3..6af7361976 100644
--- a/athena/queues/private-channel-request-approved.js
+++ b/athena/queues/private-channel-request-approved.js
@@ -45,7 +45,9 @@ export default async (job: Job<PrivateChannelRequestApprovedJobData>) => {
   const recipients = await getUsers([userId]);
 
   // only get owners with emails
-  const filteredRecipients = recipients.filter(user => isEmail(user.email));
+  const filteredRecipients = recipients.filter(
+    user => user && isEmail(user.email)
+  );
 
   // for each owner, create a notification for the app
   const usersNotificationPromises = filteredRecipients.map(recipient =>
diff --git a/athena/queues/private-channel-request-sent.js b/athena/queues/private-channel-request-sent.js
index bdf51bb4f7..cf15f948d8 100644
--- a/athena/queues/private-channel-request-sent.js
+++ b/athena/queues/private-channel-request-sent.js
@@ -75,7 +75,7 @@ export default async (job: Job<PrivateChannelRequestJobData>) => {
 
   // only get owners + moderators with emails
   const filteredRecipients = recipientsWithUserData.filter(
-    owner => owner.email && isEmail(owner.email)
+    owner => owner && owner.email && isEmail(owner.email)
   );
 
   // for each owner, create a notification for the app
diff --git a/athena/queues/private-community-request-approved.js b/athena/queues/private-community-request-approved.js
index f2f05da072..217dc2013b 100644
--- a/athena/queues/private-community-request-approved.js
+++ b/athena/queues/private-community-request-approved.js
@@ -42,7 +42,9 @@ export default async (job: Job<PrivateCommunityRequestApprovedJobData>) => {
 
   const community = await getCommunityById(communityId);
   const recipients = await getUsers([userId]);
-  const filteredRecipients = recipients.filter(user => isEmail(user.email));
+  const filteredRecipients = recipients.filter(
+    user => user && isEmail(user.email)
+  );
   const usersNotificationPromises = filteredRecipients.map(recipient =>
     storeUsersNotifications(updatedNotification.id, recipient.id)
   );
diff --git a/athena/queues/private-community-request-sent.js b/athena/queues/private-community-request-sent.js
index 65b78cdea5..52ee897e71 100644
--- a/athena/queues/private-community-request-sent.js
+++ b/athena/queues/private-community-request-sent.js
@@ -59,7 +59,7 @@ export default async (job: Job<PrivateCommunityRequestJobData>) => {
 
   // only get owners + moderators with emails
   const filteredRecipients = recipientsWithUserData.filter(
-    owner => owner.email && isEmail(owner.email)
+    owner => owner && owner.email && isEmail(owner.email)
   );
 
   // for each owner, create a notification for the app
diff --git a/athena/queues/send-slack-invitations.js b/athena/queues/send-slack-invitations.js
index 9e51b826bf..2aea444f83 100644
--- a/athena/queues/send-slack-invitations.js
+++ b/athena/queues/send-slack-invitations.js
@@ -62,7 +62,13 @@ const processJob = async (job: Job<SendSlackInvitationsJobData>) => {
     // filter out deleted members
     .filter(member => !member.deleted)
     // only save members with valid email
-    .filter(member => member.profile.email && isEmail(member.profile.email))
+    .filter(
+      member =>
+        member &&
+        member.profile &&
+        member.profile.email &&
+        isEmail(member.profile.email)
+    )
     // format output data
     .map(member => ({
       firstName: member.profile.first_name,
diff --git a/hermes/send-email.js b/hermes/send-email.js
index bfa701d3e8..5eca3a86dd 100644
--- a/hermes/send-email.js
+++ b/hermes/send-email.js
@@ -1,4 +1,5 @@
 // @flow
+import isEmail from 'validator/lib/isEmail';
 import postmark from 'postmark';
 const debug = require('debug')('hermes:send-email');
 const stringify = require('json-stringify-pretty-compact');
@@ -46,6 +47,35 @@ const sendEmail = (options: Options) => {
     });
   }
 
+  if (!To) {
+    if (userId) {
+      trackQueue.add({
+        userId: userId,
+        event: events.EMAIL_BOUNCED,
+        properties: { tag: Tag, error: 'To field was not provided' },
+      });
+    }
+
+    return;
+  }
+
+  if (!isEmail(To)) {
+    if (userId) {
+      trackQueue.add({
+        userId: userId,
+        event: events.EMAIL_BOUNCED,
+        // we can safely log the To field because it's not a valid email, thus not PII
+        properties: {
+          tag: Tag,
+          to: To,
+          error: 'To field was not a valid email address',
+        },
+      });
+    }
+
+    return;
+  }
+
   // $FlowFixMe
   return new Promise((res, rej) => {
     client.sendEmailWithTemplate(
@@ -65,7 +95,7 @@ const sendEmail = (options: Options) => {
               trackQueue.add({
                 userId: userId,
                 event: events.EMAIL_BOUNCED,
-                properties: { tag: Tag },
+                properties: { tag: Tag, error: err.message },
               });
             }
 
@@ -74,6 +104,17 @@ const sendEmail = (options: Options) => {
               .catch(e => rej(e));
           }
 
+          if (err.code === 422) {
+            if (userId) {
+              trackQueue.add({
+                userId: userId,
+                event: events.EMAIL_BOUNCED,
+                // we can safely log the To field as error 422 means the To field is malformed anyways and is not a valid email address
+                properties: { tag: Tag, error: err.message, to: To },
+              });
+            }
+          }
+
           console.error('Error sending email:');
           console.error(err);
           return rej(err);
diff --git a/hyperion/renderer/html-template.js b/hyperion/renderer/html-template.js
index 15def51814..fb51bc5346 100644
--- a/hyperion/renderer/html-template.js
+++ b/hyperion/renderer/html-template.js
@@ -93,7 +93,7 @@ export const getFooter = ({
       <script defer="defer" src="/install-raven.js"></script>
       <script>window.__SERVER_STATE__=${serialize(state)}</script>
       <script>window.__DATA__=${serialize(data)}</script>
-      <script defer="defer" type="text/javascript" src="https://cdn.polyfill.io/v2/polyfill.min.js"></script>
+      <script defer="defer" type="text/javascript" src="https://cdn.polyfill.io/v2/polyfill.min.js?features=default,Array.prototype.find,Symbol.iterator"></script>
       <script type="text/javascript" src="/static/js/bootstrap.js"></script>
       ${bundles.map(src => createScriptTag({ src }))}
       ${createScriptTag({ src: `/static/js/${mainBundle}` })}
diff --git a/src/components/chatInput/components/mediaUploader.js b/src/components/chatInput/components/mediaUploader.js
index 9e6044f984..bbbd5dd81b 100644
--- a/src/components/chatInput/components/mediaUploader.js
+++ b/src/components/chatInput/components/mediaUploader.js
@@ -87,7 +87,7 @@ class MediaUploader extends React.Component<Props> {
 
   onPaste = (event: any) => {
     // Ensure that the image is only pasted if user focuses input
-    if (!this.props.inputFocused) {
+    if (!event || !this.props.inputFocused) {
       return;
     }
     const items = (event.clipboardData || event.originalEvent.clipboardData)
diff --git a/src/components/composer/index.js b/src/components/composer/index.js
index 7372b42173..6265f9139e 100644
--- a/src/components/composer/index.js
+++ b/src/components/composer/index.js
@@ -284,7 +284,7 @@ class ComposerWithData extends Component<Props, State> {
     const title = e.target.value;
     this.persistTitleToLocalStorageWithDebounce(title);
     if (/\n$/g.test(title)) {
-      this.bodyEditor.focus();
+      this.bodyEditor.focus && this.bodyEditor.focus();
       return;
     }
     this.setState({
diff --git a/src/components/threadComposer/components/composer.js b/src/components/threadComposer/components/composer.js
index cf45e3c9f0..98c65117c3 100644
--- a/src/components/threadComposer/components/composer.js
+++ b/src/components/threadComposer/components/composer.js
@@ -351,7 +351,7 @@ class ThreadComposerWithData extends React.Component<Props, State> {
   changeTitle = e => {
     const title = e.target.value;
     if (/\n$/g.test(title)) {
-      this.bodyEditor.focus();
+      this.bodyEditor.focus && this.bodyEditor.focus();
       return;
     }
     persistTitle(title);
diff --git a/src/views/community/components/channelList.js b/src/views/community/components/channelList.js
index e551da2c5b..af4a6e878a 100644
--- a/src/views/community/components/channelList.js
+++ b/src/views/community/components/channelList.js
@@ -32,7 +32,9 @@ type Props = {
 };
 
 class ChannelList extends React.Component<Props> {
-  sortChannels = (array: Array<any>): Array<any> => {
+  sortChannels = (array: Array<any>): Array<?any> => {
+    if (!array || array.length === 0) return [];
+
     const generalChannel = array.find(channel => channel.slug === 'general');
     const withoutGeneral = array.filter(channel => channel.slug !== 'general');
     const sortedWithoutGeneral = withoutGeneral.sort((a, b) => {
diff --git a/src/views/explore/components/search.js b/src/views/explore/components/search.js
index f5fb5dc204..2fa490f0ec 100644
--- a/src/views/explore/components/search.js
+++ b/src/views/explore/components/search.js
@@ -5,12 +5,13 @@ import { withRouter } from 'react-router';
 import { connect } from 'react-redux';
 import compose from 'recompose/compose';
 import Link from 'src/components/link';
-import { Button } from '../../../components/buttons';
-import { throttle } from '../../../helpers/utils';
+import { Button } from 'src/components/buttons';
+import { throttle } from 'src/helpers/utils';
 import { searchCommunitiesQuery } from 'shared/graphql/queries/search/searchCommunities';
 import type { SearchCommunitiesType } from 'shared/graphql/queries/search/searchCommunities';
-import { Spinner } from '../../../components/globals';
-import { addToastWithTimeout } from '../../../actions/toasts';
+import { Spinner } from 'src/components/globals';
+import { addToastWithTimeout } from 'src/actions/toasts';
+import OutsideClickHandler from 'src/components/outsideClickHandler';
 import {
   SearchWrapper,
   SearchInput,
@@ -126,9 +127,7 @@ class Search extends React.Component<Props, State> {
     // if person presses escape
     if (e.keyCode === 27) {
       this.setState({
-        searchResults: [],
-        searchIsLoading: false,
-        searchString: '',
+        isFocused: false,
       });
 
       // $FlowFixMe
@@ -152,8 +151,11 @@ class Search extends React.Component<Props, State> {
       if (indexOfFocusedSearchResult === searchResults.length - 1) return;
       if (searchResults.length <= 1) return;
 
+      const resultToFocus = searchResults[indexOfFocusedSearchResult + 1];
+      if (!resultToFocus) return;
+
       return this.setState({
-        focusedSearchResult: searchResults[indexOfFocusedSearchResult + 1].id,
+        focusedSearchResult: resultToFocus.id,
       });
     }
 
@@ -162,8 +164,11 @@ class Search extends React.Component<Props, State> {
       if (indexOfFocusedSearchResult === 0) return;
       if (searchResults.length <= 1) return;
 
+      const resultToFocus = searchResults[indexOfFocusedSearchResult - 1];
+      if (!resultToFocus) return;
+
       return this.setState({
-        focusedSearchResult: searchResults[indexOfFocusedSearchResult - 1].id,
+        focusedSearchResult: resultToFocus.id,
       });
     }
   };
@@ -196,7 +201,7 @@ class Search extends React.Component<Props, State> {
   }
 
   onFocus = (e: any) => {
-    const val = e.target.val;
+    const val = e.target.value;
     if (!val || val.length === 0) return;
 
     const string = val.toLowerCase().trim();
@@ -209,6 +214,12 @@ class Search extends React.Component<Props, State> {
     });
   };
 
+  hideSearchResults = () => {
+    return this.setState({
+      isFocused: false,
+    });
+  };
+
   render() {
     const {
       searchString,
@@ -241,50 +252,55 @@ class Search extends React.Component<Props, State> {
         </SearchInputWrapper>
 
         {// user has typed in a search string
-        searchString && (
-          <SearchResultsDropdown>
-            {searchResults.length > 0 &&
-              searchResults.map(community => {
-                return (
-                  <SearchResult
-                    focused={focusedSearchResult === community.id}
-                    key={community.id}
-                  >
-                    <SearchLink to={`/${community.slug}`}>
-                      <SearchResultImage
-                        community={community}
-                        src={community.profilePhoto}
-                      />
+        isFocused &&
+          searchString && (
+            <OutsideClickHandler onOutsideClick={this.hideSearchResults}>
+              <SearchResultsDropdown>
+                {searchResults.length > 0 &&
+                  searchResults.map(community => {
+                    return (
+                      <SearchResult
+                        focused={focusedSearchResult === community.id}
+                        key={community.id}
+                      >
+                        <SearchLink to={`/${community.slug}`}>
+                          <SearchResultImage
+                            community={community}
+                            src={community.profilePhoto}
+                          />
+                          <SearchResultTextContainer>
+                            <SearchResultMetaWrapper>
+                              <SearchResultName>
+                                {community.name}
+                              </SearchResultName>
+                              {community.metaData && (
+                                <SearchResultMetadata>
+                                  {community.metaData.members} members
+                                </SearchResultMetadata>
+                              )}
+                            </SearchResultMetaWrapper>
+                          </SearchResultTextContainer>
+                        </SearchLink>
+                      </SearchResult>
+                    );
+                  })}
+
+                {searchResults.length === 0 &&
+                  isFocused && (
+                    <SearchResult>
                       <SearchResultTextContainer>
-                        <SearchResultMetaWrapper>
-                          <SearchResultName>{community.name}</SearchResultName>
-                          {community.metaData && (
-                            <SearchResultMetadata>
-                              {community.metaData.members} members
-                            </SearchResultMetadata>
-                          )}
-                        </SearchResultMetaWrapper>
+                        <SearchResultNull>
+                          <p>No communities found matching “{searchString}”</p>
+                          <Link to={'/new/community'}>
+                            <Button>Create a Community</Button>
+                          </Link>
+                        </SearchResultNull>
                       </SearchResultTextContainer>
-                    </SearchLink>
-                  </SearchResult>
-                );
-              })}
-
-            {searchResults.length === 0 &&
-              isFocused && (
-                <SearchResult>
-                  <SearchResultTextContainer>
-                    <SearchResultNull>
-                      <p>No communities found matching “{searchString}”</p>
-                      <Link to={'/new/community'}>
-                        <Button>Create a Community</Button>
-                      </Link>
-                    </SearchResultNull>
-                  </SearchResultTextContainer>
-                </SearchResult>
-              )}
-          </SearchResultsDropdown>
-        )}
+                    </SearchResult>
+                  )}
+              </SearchResultsDropdown>
+            </OutsideClickHandler>
+          )}
       </SearchWrapper>
     );
   }
diff --git a/src/views/newUserOnboarding/components/communitySearch/index.js b/src/views/newUserOnboarding/components/communitySearch/index.js
index 3dfa5b7e02..80efd165d5 100644
--- a/src/views/newUserOnboarding/components/communitySearch/index.js
+++ b/src/views/newUserOnboarding/components/communitySearch/index.js
@@ -5,11 +5,12 @@ import { withRouter } from 'react-router';
 import compose from 'recompose/compose';
 import Link from 'src/components/link';
 import { connect } from 'react-redux';
-import { Button, OutlineButton } from '../../../../components/buttons';
-import ToggleCommunityMembership from '../../../../components/toggleCommunityMembership';
-import { throttle } from '../../../../helpers/utils';
+import { Button, OutlineButton } from 'src/components/buttons';
+import ToggleCommunityMembership from 'src/components/toggleCommunityMembership';
+import { throttle } from 'src/helpers/utils';
 import { searchCommunitiesQuery } from 'shared/graphql/queries/search/searchCommunities';
-import { Spinner } from '../../../../components/globals';
+import { Spinner } from 'src/components/globals';
+import OutsideClickHandler from 'src/components/outsideClickHandler';
 import type { Dispatch } from 'redux';
 import {
   SearchWrapper,
@@ -173,9 +174,7 @@ class Search extends React.Component<Props, State> {
     // if person presses escape
     if (e.keyCode === 27) {
       this.setState({
-        searchResults: [],
-        searchIsLoading: false,
-        searchString: '',
+        isFocused: false,
       });
 
       // $FlowFixMe
@@ -188,8 +187,11 @@ class Search extends React.Component<Props, State> {
       if (indexOfFocusedSearchResult === searchResults.length - 1) return;
       if (searchResults.length === 1) return;
 
+      const resultToFocus = searchResults[indexOfFocusedSearchResult + 1];
+      if (!resultToFocus) return;
+
       return this.setState({
-        focusedSearchResult: searchResults[indexOfFocusedSearchResult + 1].id,
+        focusedSearchResult: resultToFocus.id,
       });
     }
 
@@ -198,8 +200,11 @@ class Search extends React.Component<Props, State> {
       if (indexOfFocusedSearchResult === 0) return;
       if (searchResults.length === 1) return;
 
+      const resultToFocus = searchResults[indexOfFocusedSearchResult - 1];
+      if (!resultToFocus) return;
+
       return this.setState({
-        focusedSearchResult: searchResults[indexOfFocusedSearchResult - 1].id,
+        focusedSearchResult: resultToFocus.id,
       });
     }
   };
@@ -226,7 +231,7 @@ class Search extends React.Component<Props, State> {
   }
 
   onFocus = (e: any) => {
-    const val = e.target.val;
+    const val = e.target.value;
     if (!val || val.length === 0) return;
 
     const string = val.toLowerCase().trim();
@@ -239,6 +244,12 @@ class Search extends React.Component<Props, State> {
     });
   };
 
+  hideSearchResults = () => {
+    return this.setState({
+      isFocused: false,
+    });
+  };
+
   render() {
     const {
       searchString,
@@ -266,89 +277,92 @@ class Search extends React.Component<Props, State> {
             placeholder="Search for communities or topics..."
             onChange={this.handleChange}
             onFocus={this.onFocus}
-            autoFocus={window.innerWidth < 768}
+            autoFocus
           />
         </SearchInputWrapper>
 
         {// user has typed in a search string
-        searchString && (
-          <SearchResultsDropdown>
-            {searchResults.length > 0 &&
-              searchResults.map(community => {
-                return (
-                  <SearchResult
-                    focused={focusedSearchResult === community.id}
-                    key={community.id}
-                  >
-                    <SearchResultImage
-                      community={community}
-                      src={community.profilePhoto}
-                    />
-
-                    <SearchResultMetaWrapper>
-                      <SearchResultName>{community.name}</SearchResultName>
-                      {community.metaData && (
-                        <SearchResultMetadata>
-                          {community.metaData.members} members
-                        </SearchResultMetadata>
-                      )}
-                      <SearchResultDescription>
-                        {community.description}
-                      </SearchResultDescription>
-                    </SearchResultMetaWrapper>
-
-                    <div>
-                      {community.communityPermissions.isMember ? (
-                        <ToggleCommunityMembership
-                          onJoin={this.onJoinComplete}
-                          onLeave={this.onJoinComplete}
+        isFocused &&
+          searchString && (
+            <OutsideClickHandler onOutsideClick={this.hideSearchResults}>
+              <SearchResultsDropdown>
+                {searchResults.length > 0 &&
+                  searchResults.map(community => {
+                    return (
+                      <SearchResult
+                        focused={focusedSearchResult === community.id}
+                        key={community.id}
+                      >
+                        <SearchResultImage
                           community={community}
-                          render={({ isLoading }) => (
-                            <OutlineButton
-                              gradientTheme="none"
-                              color={'success.alt'}
-                              hoverColor={'success.default'}
-                              loading={isLoading}
-                            >
-                              Joined!
-                            </OutlineButton>
-                          )}
+                          src={community.profilePhoto}
                         />
-                      ) : (
-                        <ToggleCommunityMembership
-                          onJoin={this.onJoinComplete}
-                          onLeave={this.onJoinComplete}
-                          community={community}
-                          render={({ isLoading }) => (
-                            <Button
-                              loading={isLoading}
-                              gradientTheme={'success'}
-                              style={{ fontSize: '16px' }}
-                              icon={'plus'}
-                            >
-                              Join
-                            </Button>
+
+                        <SearchResultMetaWrapper>
+                          <SearchResultName>{community.name}</SearchResultName>
+                          {community.metaData && (
+                            <SearchResultMetadata>
+                              {community.metaData.members} members
+                            </SearchResultMetadata>
                           )}
-                        />
-                      )}
-                    </div>
-                  </SearchResult>
-                );
-              })}
-
-            {searchResults.length === 0 &&
-              isFocused && (
-                <SearchResult>
-                  <SearchResultNull>
-                    <p>No communities found matching “{searchString}”</p>
-                    <Link to={'/new/community'}>
-                      <Button>Create a Community</Button>
-                    </Link>
-                  </SearchResultNull>
-                </SearchResult>
-              )}
-          </SearchResultsDropdown>
-        )}
+                          <SearchResultDescription>
+                            {community.description}
+                          </SearchResultDescription>
+                        </SearchResultMetaWrapper>
+
+                        <div>
+                          {community.communityPermissions.isMember ? (
+                            <ToggleCommunityMembership
+                              onJoin={this.onJoinComplete}
+                              onLeave={this.onJoinComplete}
+                              community={community}
+                              render={({ isLoading }) => (
+                                <OutlineButton
+                                  gradientTheme="none"
+                                  color={'success.alt'}
+                                  hoverColor={'success.default'}
+                                  loading={isLoading}
+                                >
+                                  Joined!
+                                </OutlineButton>
+                              )}
+                            />
+                          ) : (
+                            <ToggleCommunityMembership
+                              onJoin={this.onJoinComplete}
+                              onLeave={this.onJoinComplete}
+                              community={community}
+                              render={({ isLoading }) => (
+                                <Button
+                                  loading={isLoading}
+                                  gradientTheme={'success'}
+                                  style={{ fontSize: '16px' }}
+                                  icon={'plus'}
+                                >
+                                  Join
+                                </Button>
+                              )}
+                            />
+                          )}
+                        </div>
+                      </SearchResult>
+                    );
+                  })}
+
+                {searchResults.length === 0 &&
+                  isFocused && (
+                    <SearchResult>
+                      <SearchResultNull>
+                        <p>No communities found matching “{searchString}”</p>
+                        <Link to={'/new/community'}>
+                          <Button>Create a Community</Button>
+                        </Link>
+                      </SearchResultNull>
+                    </SearchResult>
+                  )}
+              </SearchResultsDropdown>
+            </OutsideClickHandler>
+          )}
       </SearchWrapper>
     );
   }
diff --git a/src/views/thread/components/threadDetail.js b/src/views/thread/components/threadDetail.js
index 83093afb9e..2f17a68e7e 100644
--- a/src/views/thread/components/threadDetail.js
+++ b/src/views/thread/components/threadDetail.js
@@ -314,7 +314,7 @@ class ThreadDetailPure extends React.Component<Props, State> {
   changeTitle = e => {
     const title = e.target.value;
     if (/\n$/g.test(title)) {
-      this.bodyEditor.focus();
+      this.bodyEditor.focus && this.bodyEditor.focus();
       return;
     }
     this.setState({