guys, I have a little problem, I'm missing something...
I'm trying to install a MX Backup server in one of our ISPConfig3 server.
I read here http://www.howtoforge.com/forums/showthread.php?t=40596
the way to do it is:
Being DOMAIN.NET the domain to backup
MAIL.SERVER.NET the mail server
and BACKUP.SERVER.NET the backup server
- Adding a MX record in the DNS Zone of the domain in MAIL.SERVER.NET to BACKUP.SERVER.NET with a higther priority.
Something like: dig mx DOMAIN.NET
MX 10 MAIL.SERVER.NET
MX 20 BACKUP.SERVER.NET
- Create in the back up server an "Advance Mail Routing - Mail Transport" pointing to the first mail server.
No MX lookup: off
Sort by: 1
Ok, I done all of this and where I send an email, in the backup server mail log I'm getting:
NOQUEUE: reject: RCPT from lalala.lololo.net.[xxx.xxx.xxx.xxx]: 550 5.1.1 <firstname.lastname@example.org>: Recipient address rejected: User unknown in relay recipient table.....
That tell me the dns part it is ok but y have some bad config in the ispconfig backup server...
Can you help me? THANKS