Op 30-10-10 10:03, Per Jessen schreef:
David C. Rankin wrote:
It works just a Per described. If your main mail host is down/off-line, your mail is delivered to your backup host, held, then delivered to the primary mail host once it comes back on line.
Without a backup, if your primary is off-line for more that 24 hours, most (no all) mail host will give up trying to deliver mail and just return an error to the sender.
Postfix's default is five days, I believe. I think that might be more typical than the 24hours.
A backup mail server is quite easily set up - from memory: with postfix you take the vanilla opensuse config and add "permit_mx_backup" to "smtpd_recipient_restrictions" and change "inet_interfaces" to "all". Then you add your new backup server as an MX to your domain. [not tested, like to be incomplete].
Thanks guys, The problem is gone. Fortunately, it wasn't my modem but the infrastructure from the line-supplier. I had phoned to my ISP, who tried to test the line, but couldn't. They said to check my home-installation. There hadn't been any change, so I called the phone company. When I gave my phone number I was told there were serious problems in the whole area. A few hours later all was OK again, all in all about 16 hours outage. My ISP hadn't a clue about the real problem ! But, I'm going to make me a backup mail-server. I did study postfix's config but was puzzled. Is permit_mx_backup sufficient or do I have to specify relay_domains ? Again, thanks for your help, Koenraad Lelong. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org