Emails marked as Spam

[cfontana0]

Describe the topic
I have some issues sending emails using the strapi's service and gmail. Basically, I configured Google Suite for my company and tried to send emails using the strapi.plugins.email plugin, however, they are received as Spam all the time.

I talked with the Google Suite's support team, and they indicated me that I have to configure DKIM and SPF for my email, and I did that following these tutorial:
https://support.google.com/a/answer/174124
https://support.google.com/a/answer/33786

However, I still receiving the mails as Spam.

I talked with them again, they indicated me that I have to add a custom SPF record on my hosting service for Strapi / my domain. For instance, if I use the gmail service, I have to include v=spf1 include:serverdomain.com include:_spf.google.com ~all

Any idea?

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Additional context
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[derrickmehaffy]

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[derrickmehaffy]

As a side note I don't believe this is directly an issue with Strapi unless some specific header needs to be passed?

[tiberiumihai]

I know this is closed but I think the strapi-provider-email-sendmail needs to have a configuration like in the example from node-sendmail:

const sendmail = require('sendmail')({
  logger: {
    debug: console.log,
    info: console.info,
    warn: console.warn,
    error: console.error
  },
  silent: false,
  dkim: { // Default: False    <---------------- THIS SHOULD BE ADDED
    privateKey: fs.readFileSync('./dkim-private.pem', 'utf8'),
    keySelector: 'mydomainkey'
  },
  devPort: 1025, // Default: False
  devHost: 'localhost', // Default: localhost
  smtpPort: 2525, // Default: 25
  smtpHost: 'localhost' // Default: -1 - extra smtp host after resolveMX
})

Source: node-sendmail git repo

You can create your own provider though with these properties like this:
Email > create-new-provider

[lauriejim]

This issue has been mentioned on Strapi Community. There might be relevant details there:

https://forum.strapi.io/t/unsolved-problem-emails-goes-to-spam/512/1