My message was blocked – Google Product Forums
Posted by jpluimers on 2019/03/18
Cool: https://support.google.com/mail/?p=RfcMessageNonCompliant
So Google does RFC checkking: [Archive.is] My message was blocked – Google Product Forums and shows bot the above link and this in the SMTP protocol:
“Our system has detected that this message is not RFC 5322 compliant,”
After that is the actual reason (for instance no From).
–jeroen






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