Hi there,
this forum helped me a lot in my journey so far with my Proxmox VE, so I am surprised, that I couldn't find a post about my problem.
I set up an email Notification with the type SMTP. The test notification works, and the one time a backup didn't work, it also sent a correct email.
Now I logged in to my sending Email account, and I saw a lot of rejected Email notifications.
Your message contains invalid characters (bare line feed characters) which the email servers at xxx.com don't support.
After reading a bit online, as far as I understand, this error comes from a line feed ... duh ... in the original message that could be used to inject a malformed message.
Then I checked the returned Email, and I think I found the culprit, the subject.
Subject: SMART error (OfflineUncorrectableSector) detected on host:
*hostname*
The Email path is PVE via SMTP → gmx.net → outlook.com → 1&1
1&1 (kundenserver.de) return the Email with this message:
550 5.6.11 SMTPSEND.BareLinefeedsAreIllegal; message contains
bare linefeeds, which cannot be sent via DATA and receiving
system does not support BDAT
I can't find where to configure the subject as I suspect, it is a configuration issue. (Or can I set a rule that replaces line feeds with whitespace or something similar?)
Also, I recon, 1&1 uses an old standard that does not support BDAT, which could be concerning?
If someone has a pointer for me on where to start, I would be very greatful!
In the meantime, I am going to check my drives ...
Thanks in advance!
Greetings Andi
this forum helped me a lot in my journey so far with my Proxmox VE, so I am surprised, that I couldn't find a post about my problem.
I set up an email Notification with the type SMTP. The test notification works, and the one time a backup didn't work, it also sent a correct email.
Now I logged in to my sending Email account, and I saw a lot of rejected Email notifications.
Your message contains invalid characters (bare line feed characters) which the email servers at xxx.com don't support.
After reading a bit online, as far as I understand, this error comes from a line feed ... duh ... in the original message that could be used to inject a malformed message.
Then I checked the returned Email, and I think I found the culprit, the subject.
Subject: SMART error (OfflineUncorrectableSector) detected on host:
*hostname*
The Email path is PVE via SMTP → gmx.net → outlook.com → 1&1
1&1 (kundenserver.de) return the Email with this message:
550 5.6.11 SMTPSEND.BareLinefeedsAreIllegal; message contains
bare linefeeds, which cannot be sent via DATA and receiving
system does not support BDAT
I can't find where to configure the subject as I suspect, it is a configuration issue. (Or can I set a rule that replaces line feeds with whitespace or something similar?)
Also, I recon, 1&1 uses an old standard that does not support BDAT, which could be concerning?
If someone has a pointer for me on where to start, I would be very greatful!
In the meantime, I am going to check my drives ...
Thanks in advance!
Greetings Andi