Mail Sending Problem

[sajithgsm]

Hi,

Sometimes this message is getting in "Track Delivery".

"message has lines too long for transport"

And it's failing. Do you have any idea what is that?

 

[andrew.n]

This is a bug with emails sent from Outlook. A fix has been published to cPanel version 102.0.2.

https://support.cpanel.net/hc/en-us/articles/4420121088919-Exim-4-95-message-has-lines-too-long-for-transport-Error

 

[Sanal Varghese]

Hi sajithgsm,

Headers or other lines in the email may be longer than the character limit which triggers this error.

The issue may be related to sending emails via Outlook. A fix has been published to cPanel version 102.0.2.

Thanks.

Regards,
Sanal Varghese

 

[victso]

It appears users moving from v100 to v102.0.8 once again seeing that under certain circumstances outbound email bounces with an error similar to the following:

"1nBxPK-0023Ax-M1 ** [email protected] R=dkim_lookuphost T=dkim_remote_smtp: message has lines too long for transport"

Cpanel's team opened an internal case for their development team to investigate this further. For reference, the case number is CPANEL-40305. Follow this article to receive an email notification when a solution is published in the product.

>>Workaround<<
None at this time

https://support.cpanel.net/hc/en-us/articles/4967485254551-Exim-4-95-message-has-lines-too-long-for-transport-Error-after-upgrading-to-102-0-8

 

[cPRex]

There's been a few threads on this so I didn't see this one to mention the update. If you're still seeing the issue, you can adjust that value in WHM >> Exim Configuration editor under the " Maximum line length for SMTP transports (Minimum: 1; Maximum: 65,536)" option.