Hi @haseeb0001
Sorry, I’m not sure I understand your comment correctly. Can you please elaborate?
I noticed in the commit history, that the format of the message ID was changed, but recently reverted again. Do you know the reason?
https://ww.wp.xz.cn/support/topic/invalid_msgid-message-id-is-not-valid-according-to-rfc-2822/
You could configure an email sandbox service like mailtrap.io or HELO.
Every mail sent will be delivered to a catch-all inbox.
Hello
Our SpamAssassin score is also negatively affected by the Message-ID header not following the RFC 2822.
I’ll donate a $50 bounty if this issue can be resolved within the next week.
Thanks, Martin.