On 9/18/2013 12:50 PM, Matus UHLAR - fantomas wrote: >> On 9/18/2013 10:40 AM, Matthias Wimmer wrote: >>> You cannot forward such mails to another server. In short, you cannot >>> forward the main postmaster account of a courier mail server to an account >>> on another mail server. > On 18.09.13 11:39, Bowie Bailey wrote: >> But there are no local mailboxes on this server. Everything is >> forwarded to another server for delivery. What do you do with the >> postmaster account on a server with no local mailboxes? >> >> Normally this is not an issue. This time, there was a DNS problem >> overnight which caused a bunch of these double bounce messages to pile >> up. And I think the delivery attempts were causing the second server to >> tarpit the first one slowing everything down to a crawl -- not what you >> want with over 3000 messages in the queue. > if your 2nd server relays mail from server w/o local mail, it should accept > all mail. Otherwise, if you forward mail through other server, you should > have local mailbox for mails that could not be sent outside.
The first server accepts mail for the local users and then forwards it to the second server for delivery to the mailboxes. Nothing is forwarded to the second server that should not be accepted. The problem was not with the user, the problem was with the from address that was generated for the bounce. > What should courier do with mail that can't be delivered nor bounced, drop > it? That way you would not know about any problem and your mail would be > lost without any track of the problem. What happened was that the DNS died, so the first server could not contact the 2nd server for delivery. That must have caused a DSN to be generated due to the delay and when that address was undeliverable (as it is for some of our internal server messages), it generated the double-bounce. I don't think I'm going to worry about it much since this is an unusual situation and I cannot find any evidence of a double-bounce being generated any other time in the last month's worth of logs. -- Bowie ------------------------------------------------------------------------------ LIMITED TIME SALE - Full Year of Microsoft Training For Just $49.99! 1,500+ hours of tutorials including VisualStudio 2012, Windows 8, SharePoint 2013, SQL 2012, MVC 4, more. BEST VALUE: New Multi-Library Power Pack includes Mobile, Cloud, Java, and UX Design. Lowest price ever! Ends 9/20/13. http://pubads.g.doubleclick.net/gampad/clk?id=58041151&iu=/4140/ostg.clktrk _______________________________________________ courier-users mailing list courier-users@lists.sourceforge.net Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
