This guide will help you resolve an issue if you received, after sending an email, a message with the failure reason "Spam Message Rejected" or "5.7.0 AV: Message is rejected by headers rule filter.. 554 Please check the message and try again"...

Must be checked absolutely

Check that your email did not contain:

• words or phrases that are often associated with spam, as it could be identified as an unwanted message and rejected
• any unusual indication in the signature, a incorrectly formatted link (http//.domain.xyz for example), etc.
• an attachment with one of these forbidden extensions: .exe, .com, .cmd, .cpl, .hta, .scf, .sct, .lnk, .bat, .js, .jse, .wsh, .ws, .wsf, .wsc, .vbe, .vb, .vbs, .shs, .pif, .scr ... including inside a compressed file (.zip for example)

To send a file (e.g., js or exe) and confirm it is virus-free, store it on your hosting space and create a link to it (if the file is large and you are sending it from the Web Mail Infomaniak app (online service mail.infomaniak.com), it will be placed on a temporary server allowing it to be sent to your recipient, who will receive a download link in this case) or via Swisstransfer.com.

Also check your SPF record. If your domain does not have an SPF record or if this record is incorrect, it will very likely cause your message to be rejected.

If you believe you have received a "Spam Message Rejected" message without reason, contact Infomaniak support.