On 23 March 2019 20:59 Wojciech Puchar via dovecot < dovecot@dovecot.org> wrote:


>>
>> someone@somewhere.pl some-unix-account
>>
>> For this few users and have everything like it is now?
>
put this before the passwd passdb...
passdb {
driver = passwd-file
args = username_format=%Lu /path/to/some/passwd
}
then put this into the passwd file
alias@user:::::::user=real.username@domain

thank you for help. exactly what i needed.

one more question.

Do i need to restart dovecot everytime i change this passwd-file?

No need. 
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Aki Tuomi