This guide will help you resolve an issue if you received, after sending an email, a message containing 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

Check that your email did not contain:

• words or phrases that are often associated with spam, as it could be identified as unwanted and rejected
• any unusual indication in the signature, a link formulated incorrectly (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 (js or exe for example) and confirm that 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 Infomaniak Web app Mail (online service ksuite.infomaniak.com/mail), it will be placed on a temporary server allowing it to be sent to your correspondent 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, this will very likely result in the rejection of your message.

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