[Dovecot] Sieve/pigeonhole rejects email addresses for valid UNIX users

[Stephan Bosch]

Op 8/22/2012 8:56 AM, David Anderson schreef:
>
> Self-explanatory, I hope (note the period on the end of the username); 
> sieve/pigeonhole does not allow you to have senders which end with a 
> period, which means that any UNIX users with such usernames who send 
> mail have it rejected by sieve:
>
> # useradd testuser.
> # su - testuser.
> $ mail david at example.com -s 'testing'
> 123
> .
> [testuser. at levi ~]$ logout
>
> # less /var/log/maillog
>
> Aug 22 07:50:56 levi dovecot: lda(david at example.com): Error: sieve: 
> envelope sender address 'testuser. at myhost.example.com' is unparsable
>
> Versions:
> dovecot-pigeonhole-0.2.6-21.el5
> dovecot-managesieve-0.2.6-21.el5
> dovecot-2.0.18-1_134.el5
>
> Why would anyone have a UNIX username ending in a period? For one, web 
> hosting companies may use your domain name as your username - but be 
> subject to a 32-character limit, so your domain name gets truncated.

I would have expected to see that address escaped as 
"testuser."@myhost.example.com. I notice that I haven't tested such 
addresses much with Sieve and I don't actually know in what form MTAs 
provide such addresses to the LDA. I'll give that a look soon.

Regards,

Stephan.