Add better parsing of email addresses and add tests for mailgun#407
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eyeseast
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Jun 8, 2026
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Our previous logic took everything before the first @, which in some cases would include a leading quotation mark " (depending I guess on the email server sending it) like:
""uuid@uploads.documentcloud.org" uuid@uploads.documentcloud.org"
in the To field. This PR moves us to use a more robust and built in email parsing email.utils.parseaddr which will handle those leading quotes automatically, as well as < and other possible symbols. It also automatically rejects malformed inputs for safety.
This PR also raises ValidationErrors in case parseaddr somehow doesn't catch anything and adds some tests for mailgun since there were none. I had Claude write the tests because they are boilerplate.
Closes #406