Re: retiring a mail server

4 msg	Rewriting To: field for outbound messages
13 msg	My server send e-mails that are considered SPAM
6 msg	Web Based Front End - Update
2 msg	mailman subdomain not recognized by some mail s...
14 msg	Trying to feed an script with an email
5 msg	Q: smtpd_recipient_restrictions w/reject_unlist...
2 msg	Question about recipient canonical rewrite and ...
3 msg	QQ regarding server performance impact when doi...
1 msg	Re: qshape and greylisting
4 msg	Address Verification Question
8 msg	Distributed mailbombing on one address
2 msg	Trouble with postmaster alias
5 msg	Parent domains confusion?
2 msg	Anti-virus scanning with Postfix & Mac OS X
2 msg	Folder Structure help
8 msg	qmgr_active_corrupt

retiring a mail server
\ John Baker (27 Mar 2008)
. \ Xavier Romero (27 Mar 2008)
. \ (Wietse Venema) (27 Mar 2008)

2 msg	SMTP verification
9 msg	Multiple IPs
2 msg	Controlling out going messages

Subject:	Re: retiring a mail server
Group:	Postfix-users
From:	(Wietse Venema)
Date:	27 Mar 2008

John Baker:
> Hi all
>
> I've rebuilt my system on two new mail servers. I want to clear all the
> mail out of the old one, stop taking connections and shut it down. What
> is the best way to do this to insure that mo mail is possibly lost?

Assuming that the old and new MTAs use different myhostname settings
(otherwise mail the SMTP client will report a mailer loop and bounce
all mail):

1) turn off smtpd in master.cf

2) specify relayhost=[the.new.host] in main.cf, including the []

3) postfix reload

Wietse