Sender address when notifying original recipient

[Timo Sirainen]

On 22 May 2017, at 10.07, Christoph Pleger <Christoph at plmail.de> wrote:
> 
> Hello,
> 
>>>> I am using sieve with notification of the original recipient in the case
>>>> that an email has been identified to contain a virus. After upgrading
>>>> dovecot from 2.2.21 to 2.2.29.1, I now detected that in these
>>>> notifications, their sender address is now <postmaster@>, instead of
>>>> <postmaster at mailserver.domain>, like it was before.
>>>> Is it possible to revert to the old format?
>>> No idea so far? Though I forgot to write that I also updated
>>> pigeonhole, the change in the format of the sender address must be
>>> caused by the updates, for I changed nothing else on my server.
>> That looks like a bug of some sort. What is your configuration (output
>> from `dovecot -n`)? What exact Sieve script demonstrates this behavior?
> 
> The output of 'dovecot -n' is attached.

It's because you have auth_username_format = %Ln, which strips away the domain.