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Horde Mailer unsecure?

Yes, I guess this is true, just because it is very old.

But this is running at background very often, unreachable from outside, but then maybe blocked from very motivated IT security. :)

In my case it is the Nextcloud webmail client and I want to share how to change the Message-Id Header to prevent this!

 

Go to the file:

<NEXTCLOUDPATH>/apps/mail/vendor/bytestream/horde-mime/lib/Horde/Mime/Headers/MessageId.php

 

to line 35 and change it to e.g.:

 

    public static function create($prefix = 'MoliMail')

 

Best...

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