Question Add disclaimer/signature to every email from one domain

[miloszryckobozenski]

Server operating system version

Ubuntu 20.04

Plesk version and microupdate number

18.0.48

Hi!

I need to add some kind of disclaimer in html to every email address from one domain.

I found alterMIME which looks fine.

But I have a question: is it safe to modify /etc/postfix/master.cf and add files to /etc/postfix/ ? Or how to do it without worrying that some Plesk updates will reset configuration?

In some KB article I found warning:

Warning: any customization made in Postfix configuration can be overwritten by Plesk update (for example, in case of bug fix, when configuration files are updated), Plesk upgrade or by mchk utility, which resets default mail server configuration.

But for example, here: https://support.plesk.com/hc/en-us/...-and-SMTP-banner-in-Postfix-on-a-Plesk-server there is no warning about modyfing master.cf.

So I would be thankful for any ideas how to extend postfix configuration safely without worrying about updates or mchk utility.

Thanks!
Milosz

 

[IgorG]

https://support.plesk.com/hc/en-us/articles/115003766593-Why-customization-of-etc-postfix-main-cf-and-etc-postfix-master-cf-on-a-Plesk-server-gets-reverted-