>> Uhm... so you're saying that someone sends an email to ASSP, >> the latter proxies the email to IIS SMTP which *accepts* it, the >> IIS SMTP then /tries/ to route the email to the messagelabs MX >> and, failing to do so, retries that over and over ? >> >> If that's the case, then it sounds like it's the messagelabs MX >> which is *closing* the connection w/o returning an SMTP error >> code, in such a case the resend is normal since it's due to the >> standard SMTP retry mechanism
> More or less. It happens using IIS "or" Mailenable. I am going to try > hmailserver next. Really annoying. > > The log snips were from mailenable. Hmm.... (uh, please avoid top posting) so it sounds like the issue is caused by the messagelabs servers which, for some reason suddenly drop the connection; in such a case WHATEVER SMTP server will just requeue the message and retry sending until reaching the retry limit... which I think is what's happening in your case; now, the real point is... WHY are messagelabs servers doing so ? I wonder if they are using some kind of "nolisting" approach to reduce the amount of junk their servers process, that may explain the "drop" but in such a case, a retry toward another MX (IP/host) should go through (or get a regular reject) - as for nolisting (or MX sandwich which is a tweak) if you aren't familiar with it, have a look at http://nolisting.org/ - at any rate, if this is the case, there isn't so much you can do about this issue... aside from setting up things so that, email going to domains using messagelabs will be sent to your ISP "smarthost" so delivery attempts/retries will be handled by those servers :) ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Assp-test mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/assp-test
