Unless you run with linux capability net_bind_service. But I just found this page[1] maybe those user options help.

[1] https://wiki.dovecot.org/HowTo/Rootless

-----Original Message----- From: Benny Pedersen via dovecot [mailto:dovecot@dovecot.org] Sent: maandag 2 december 2019 20:21 To: dovecot@dovecot.org Subject: Re: running dovecot under different user

On 2019-12-02 20:08, Marc Roos via dovecot wrote:

Did anyone ever managed to run dovecot as a non-root user?

basic: all ports below 1024 need to be setup from root unix system user

so yes dovecot can run non rooted if all binded ports is over 1023

if thats practical