Good morning, I started getting error message when delivering emails to yahoo and gmail. I have not changed any settings on my server. I have SPF and DKIM enabled. A friend told me he also started getting these errors on his server with ISPCONFIG. The error logs have this pattern: Gmail <[email protected]>: host gmail-smtp-in.l.google.com[74.125.21.26] said: 550-5.7.1 [xxx.xx.xxx.xx 11] Our system has detected that this message is 550-5.7.1 not RFC 5322 compliant: 550-5.7.1 'From' header is missing. 550-5.7.1 To reduce the amount of spam sent to Gmail, this message has been 550-5.7.1 blocked. Please visit 550-5.7.1 https://support.google.com/mail/?p=RfcMessageNonCompliant 550 5.7.1 and review RFC 5322 specifications for more information. g33si684431ywk.477 - gsmtp (in reply to end of DATA command) Yahoo <[email protected]>: host mta7.am0.yahoodns.net[98.136.216.26] said: 554 Transaction failed: empty DATA not allowed (in reply to end of DATA command) Does this happen to anyone else? Does anyone have a solution? Thank you
