this is driving me nuts. I have a workflow rule (tried a flow, and an approval process, they all behave the same) that upon field update sends an email with some merge fields, etc. to 2 users and one additional email. Only the additional email accounts receives the email (yes), the 2 users get nothing (no). I checked permissions, deliverability, my settings, everything I could google to help myself out of this pickle. Thanks for any and all help.
According to the log, it seems to be blocked by Google.
Make sure that the sender's domain already has SPF and DKIM setup.
421-4.7.30 Your email has been rate limited because DKIM authentication didn't
421-4.7.30 pass for this message. Gmail requires all bulk email senders to
421-4.7.30 authenticate with DKIM.
Your email has been rate limited because DKIM authentication didn't pass for this message. Gmail requires all email bulk senders to authenticate their email with DKIM.
Authentication results: DKIM = Did not pass.
To set up DKIM for your sending domains, visit Set up DKIM. To learn more about Gmail requirements for bulk email senders, visit Email sender guidelines
.
https://support.google.com/a/answer/3726730?hl=en
https://www.reddit.com/r/sysadmin/comments/1ft1in8/google_4214730_email_response_am_i_for_sure_a/Error '550-5.7.26 Unauthenticated email from *recipient's domain* is not accepted' in Email Log
https://help.salesforce.com/s/articleView?id=000391969&type=1
