Bounce from lmtp with 5.5.2 Syntax error

Ted Cabeen secabeen at
Fri Jun 20 15:59:04 EDT 2003

Rob Siemborski <rjs3 at> writes:

> On Fri, 20 Jun 2003, Ted Cabeen wrote:
>> Anybody know what would cause this error?  I get it every couple of
>> thousand messages on this testing mailbox.
> [snip]
>> <mailmonitor at>: host
>>     /var/spool/postfix/sockets/lmtp[/var/spool/postfix/sockets/lmtp] said: 500
>>     5.5.2 Syntax error (in reply to MAIL FROM command)
> If you had the protocol logs of this transaction it would help to diagnose
> the problem.

Okay.  I'll turn on the debugging tonight and if it happens over the
weekend, I'll send it to the list.

> My guess is that postfix is sending a badly formed command of some sort,
> but I can't be more specific than that without the logs (enable telemetry
> logging for lmtp and find a transaction that fails in this way).


> The 5.5.2 error is specifically generated if we can't match the first
> character of the command.  So it looks like postfix thinks its sending
> MAIL FROM but is actually sending something else (\rMAIL FROM maybe?)

I'll look at that.  Thanks for the info.

Ted Cabeen             ted at 
Check Website or Keyserver for PGP/GPG Key BA0349D2         secabeen at
"I have taken all knowledge to be my province." -F. Bacon  secabeen at
"Human kind cannot bear very much reality."-T.S.Eliot        cabeen at

More information about the Info-cyrus mailing list