I can confirm that this is still an issue with a new deployment as of today using Sendgrid API.
Maybe @tneville or @yehuda have some input.
Good morning,
Firstly, thank you for producing such a remarkable tool.I wanted to give this thread a bump to also say I’ve experienced the same issue while using the SendGrid API & Post SMTP. Mail-Tester has reported along the same lines of
Message-Id is not valid, according to RFC 2822
And gmail reported the same
Message-ID: <60c4d018.1c69fb81.537e.ea91SMTPIN_ADDED_BROKEN@mx.google.com>
X-Google-Original-Message-ID: fc14356b4aaa945706d135de31a70de3@example.com
