Thanks Scott i did actually down my primary server n w8ed n got the mail which was sent but actually did not see the header from my secondary mail server i will test it again really apprecitte thnks once again regards fabian > on 7-14-2008 1:45 PM fabian dacunha spake the following: >> Dear All, >> >> I have been using centos 5.1 for quite some time as out DNS and mail >> server >> and been workin fine >> >> i use sendmail as my mail server >> >> i did setup a backup mail server as per docs and ran th dns test from >> http://www.checkdns.net >> >> and it says both the mail servers are fine >> >> >> but i would like to know the following >> >> how would i really know if my main primary server is down all my mails r >> goin to my secondary mail server >> >> and when my primary is up are the mails copied back to my primary >> >> i did put down my mail server for abt 3 hrs cause cant keep it down for >> long but did not really see anything >> >> also are there any websites that can chec both my mail servers correctly >> >> >> apprecite and thnaks >> >> >> >> > A real simple test would be to bring down the primary and send yourself > something from an outside address like yahoo or gmail. give it 10 or 15 > minutes, bring the primary up and when you see the message to yourself, it > should have a header from your backup server also. > > -- > MailScanner is like deodorant... > You hope everybody uses it, and > you notice quickly if they don't!!!! > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.