On 09/20/2018 12:56 PM, Robert Schetterer wrote:
Am 20.09.2018 um 11:04 schrieb Michael Goth:
Hello,
I'm setting up Dovecot 2.3.2.1 as a submission proxy to a Postfix
backend server. Dovecot announces CHUNKING, but the Postfix backend
does not support (or announce) it.
HELO from Postfix:
220 backend.mydomain.com ESMTP Postfix (Ubuntu)
ehlo test
250-backend.mydomain.com
250-PIPELINING
250-SIZE 104857600
250-VRFY
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
HELO from Dovecot proxy:
220 proxy.mydomain.com Dovecot ready.
ehlo test
250-proxy.mydomain.com
250-8BITMIME
250-AUTH PLAIN LOGIN
250-BURL imap
250-CHUNKING
250-ENHANCEDSTATUSCODES
250-SIZE
250-STARTTLS
250 PIPELINING
When a client sends BDAT, Postfix closes the connection. Here's a log
snippet from Postfix:
< MAIL FROM:<u...@mydomain.com>
> 250 2.1.0 Ok
< RCPT TO:<s...@recipient.com>
> 250 2.1.5 Ok
< BDAT 114098 LAST
> 502 5.5.2 Error: command not recognized
< Content-Type: multipart/alternative;
boundary=Apple-Mail-55D35F74-2EB7-4B3B-A607-E421DD71C07A
> 221 2.7.0 Error: I can break rules, too. Goodbye.
Apple Mail seems to ignore the fact that Postfix does not understand
BDAT and Postfix does not like that :-)
From a quick glance at the code it seems CHUNKING is always added to
the capabilities and that's not configurable. Is this a bug or am I
doing something wrong?
Thanks,
Michael
that "may" version depend
http://www.postfix.org/features.html
...
Postfix 3.4 SMTP server support for RFC 3030 CHUNKING (without
BINARYMIME).
...
As far as I understand, Dovecot always adds certain capabilities. This
is the responsible code (I think):
https://github.com/dovecot/core/blob/c8d03c3cab68328947a5afb47f48aef5b5a1e4ab/src/submission/submission-client.c#L95
