Re: Strange conversion of 5.2.2 into 4.1.0 error
- On Fri, May 03, 2013 at 02:25:15PM +0200, Ralf Hildebrandt wrote:
> Section 18.104.22.168 of RFC 2821 (22.214.171.124.10 in RFC 5321) recommends to treatRFCs have bugs, this is one of them. In practice MTAs don't return
> a 552 response after the RCPT TO command as if it was actually a 452
> response. This behaviour was intended for cases where the number of
> recipients exceeds the MTA's limits, and the idea was that the sending
> MTA should requeue the extra recipients.
552 for "too many recipients", and the 552->452 mapping creates more
problems than it solves.
> Section 6.4 of RFC 1870 contradicts this, and explicitly says that aIn the interim you can use 554 5.2.2 ... which won't be misunderstood.
> 552 response must not requeue the recipient. This is intended for cases
> where the message size limit is imposed on specific recipients.
> So generally, the smtp response code 552 can be used for multiple
> incidents, like the recipient count and also for the message size. In
> order to address this kind of issue on the Email Security appliance, we
> have logged a 'defect' with number ...... "Per-recipient rejection based
> on message size in response to a RCPT command", and our engineering team
> is working on an implementation which works in all cases that all
> messages get soft or hard bounced correctly without any issues.
- * Viktor Dukhovni <postfix-users@...>:
> In the interim you can use 554 5.2.2 ... which won't be misunderstood.Yeah, I'll do that instead.
[*] sys4 AG
http://sys4.de, +49 (89) 30 90 46 64
Franziskanerstraße 15, 81669 München
Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263
Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer
Aufsichtsratsvorsitzender: Florian Kirstein