On Thu, 2009-04-23 at 17:41 +0530, Koustubha Kale wrote: > Now we can receive all mail from outside world ok, but any mail delivered to > the central server with > maildirsmtp from the branches bounces with "mail is looping" error. This must > be because of the > Delivered-To: header present in the message which was inserted by the branch > server qmail while > delivering the message to alias for onward delivery to the central server by > means of maildirsmtp. > > What I would like to know is what changed between 5.4.9 to 5.4.27 to cause > this. And how can I get > this working in 5.4.27? Can you show the full headers from one mail from the Maildir on the central server. maildirsmtp removes the Delivered-To header from the mail before sending it to the destination host by SMTP. By any chance are there two Delivered-To: headers in your mail?