Am 13.03.2014 21:08, schrieb Pol Hallen: >> There's evidence that some spammers reverse-sort MX records, >> intentionally sending to the backup MX first. Consequently, the >> backup MX /must/ have anti-spam controls identical to the primary. >> >> But consider if you truly need a backup MX. Most folks have dropped >> them because they're spam magnets, and reliability has increased >> such that extended down time is unusual. Nearly all legit mail >> servers will retry delivery for several days if your MX is down. >> >> As a compromise, some folks keep a "hot spare MX" mail server >> configured as backup MX but with port 25 firewalled off until the >> primary fails. > > hi, thanks for your reply > I need an mx-backup
says who? > because my first server could goes down * a server does not go down regulary * short network outages are meaningsless for a MX * if the server crashs monitoring / auto-restart / HA is the way to go * invest the time you spend or better said waste for a backup MX in HA how many domains do you have on your server? we are hosting some hundret business domains on a single server and only over my dead body i start the burden of a backup MX with all it's drawbacks there goes nothing down the last 10 years and network problems on the ISP side are self healing because any MTA out there re-tries for 3-5 days to deliver a message if the destination is not reachable
