LMTP bounces with invalid chars in MAIL FROM adress

Simon Matter simon.matter at invoca.ch
Thu Feb 17 08:39:07 EST 2011

>> Hi,
>> I've seen a growing number of bounced mails from Cyrus LMTP where
>> Postfix
>> logs "501 5.5.4 Syntax error in parameters (in reply to MAIL FROM
>> command))"
>> The problem is that those messages really have invalid from adresses,
>> like
>> "RosaSánchez at something.com", but Postfix still accepts them. Later,
>> Cyrus
>> runs parseaddr() on it ans correctly refuses to accept the mail.
>> Now, I'm interested to hear how others handle this case, if possible how
>> they handle it with postfix. I know that enabling
>> strict_rfc821_envelopes
>> would possibly help but that seem to be a bad idea.
> I've searched the postfix-users list and as expected I'm not the only one
> to see this issue:
> http://marc.info/?l=postfix-users&m=120168533827364&w=2
> Since postfix (and I think also other MTA's) are a bit relaxed on what
> they accept as "MAIL FROM:" addresses, is there a very good reason for
> Cyrus to be so strict?

I've just added this


May I ask for a quick review of the attached patch? It works but I'm not
sure what it breaks :)

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