Re: duplicated messages with aliases.

6 msg	Mail gateway will not forward mail for multiple...
2 msg	postfix mangles MESSAGE-ID when passing to clamd
8 msg	Problems with either canonical_maps or alias_maps
16 msg	catchall alias for wildcard subdomains?
12 msg	Will/is there a way to prevent multiple attacks...
2 msg	Expression Assistance
2 msg	per user attachment filtering using header_checks
3 msg	Can I use reject_unlisted_sender for domain names
6 msg	sending email by Relay through ISP smtp

duplicated messages with aliases.
\ Javier Togra A. (13 Jul 2007)
. \ (Wietse Venema) (13 Jul 2007)

4 msg	On-line RFCs in HTML without spam?
2 msg	local and remote users on same domain
11 msg	Large messages being dropped, but not by messag...
2 msg	.forward files question
1 msg	How to drop mail to a domain...
8 msg	mailbox_transport_maps as mysql table: some var...
1 msg	RE: Ruleset for incoming e-mail addresses
5 msg	custom queues
3 msg	Auto reply when winmail.dat file found
3 msg	relay_recipient_maps not working

Subject:	Re: duplicated messages with aliases.
Group:	Postfix-users
From:	(Wietse Venema)
Date:	13 Jul 2007

Javier Togra A.:
> Friends:
> I have fedora core6 with postfix. As pop3 I use dovecot.
>
> I am having problems when using aliases to send mail to all my personel.
> Some times I get the message:
> ==
> cannot update mailbox /var/mail/user1 for user user1. unable to create lock
> file /var/mail/user1.lock: File exists
> ==
> I know it ocurrs why user1 is just reading his mail at that moment.
> This causes postfix resend the message to all members of the alias. As
> result some user receive the message until 5 times.
>
> Please tell me how to fix this problem.

Specify an owner alias.

/etc/aliases:
everyone: :include:/etc/postfix/everyone
owner-everyone: postmaster

Wietse