Issue Email untimely line break

[Erwan]

Server operating system version

Linux / Centos

Plesk version and microupdate number

Obsidian v18.0.43

Hi all,

We are encountering a strange problem. We have an application that is several years old that generates emails. Until recently no problems.

For some time, a newline every n characters is inserted in the text of the body during generation.
The content was checked before the build, it doesn't have the problem.

Configuration:
Plesk Obsidian v18.0.43
Dovecot 2.3.18-2
Postfix 3.5.14-2

Do you have an idea?

Erwan

 

[Bitpalast]

I think I remember having seen the same in older projects. The solution was to insert a line wrap in the email message source code before 1024 minus checksum characters, e.g.
$message = rtrim(wordwrap($message, 900));
because else a single text chunk in the mail body that needs to be transported gets too long so that email clients insert an extra "line break" randomly. It had at least something to do with chunk length in the rendered email for transport.

 

[Erwan]

Big Peter!
Thank you very much!

I had encountered this several years ago but I no longer saw at all what I could have done at the time.