Strange problem on lmtp with dovecot 2.3.2.1

[Stephan Bosch]

Hi,

Op 20/08/2018 om 18:01 schreef davide marchi:
> Hi to all i have compiled and installed dovecot 2.3.2.1 on debian 6 
> with success but now i'm facing a strange problem on communication 
> from postfix installed on server A with dovecot installed on server B 
> (which version is 2.3.2.1). All incoming emails delivered from 
> esternal from server A to server B with LMTP is rejected with this 
> message error
>
> "smtpgw postfix/lmtp[1772]: 6194CA00B3: 
> to=<xxxxxxxxxxxx at mail.cgilfe.it <mailto:xxxxxxxxxxxx at mail.cgilfe.it>>, 
> relay=192.168.10.50[192.168.10.50]:24, delay=0.02, 
> delays=0/0.01/0.01/0, dsn=5.5.4, status=undeliverable (host 
> 192.168.10.50[192.168.10.50] said: 501 5.5.4 Invalid FROM: Missing 
> domain (in reply to MAIL FROM command))"
>
> I cant identify what is the problem , for now i have bypassed lmtp 
> using smtp but my goal is returning to lmtp that i have used since old 
> versions of dovecot.

Dovecot v2.2. was extremely permissive regarding address syntax. Dovecot 
v2.3+ tends to be more strict, but if there's really an interoperability 
problem we can implement a workaround. First I'd like to know what 
exactly is going on. For some reason, your incoming mails have an 
envelope "from" address without a domain part, which is normally not 
allowed and makes little sense for messages exchanged on the internet. 
Any idea why that may be happening?

Regards,

Stephan.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://dovecot.org/pipermail/dovecot/attachments/20180820/639b937c/attachment.html>