Precedence:bulk in mailer.php

[githubrsys]

Summary

The "precedence: bulk" in header set in mailer.php is a solution for giving hints to mailservers to avoid out of office messages. But unfortunately this invokes in outlook a "!! MASS-MESSAGE" introduction in the subject at the recieving party.

Solution

Either make it optional in settings or remove it.

Cheers

[githubrsys]

Update

removing the "precedence:bulk" only does not cure the phenomenom. But also removing the unsubscribe URL from the header part does.

This is insane. Once put to get a better spam score it does behave in some mailclients (outlook2016, googlemail so far) like it is not wanted.

So I think making these parts optionally or removing them entirely is the better choice.

Cheers and thanks for your work David

[PowerKiKi]

What is the behavior observed in googlemail ?

[PowerKiKi]

Closing for lack of feedback