W Twoim liście datowanym 2 stycznia 2006 (18:51:25) można przeczytać: GS> You want multiple IP Addresses for email if you are hosting more than GS> one domain. The reason is, everyone now checks for reverse DNS with GS> email so you need a different public IP Address for each email domain. GS> This way, all the reverse DNS translations will be unique. IMHO it is not true. Novadays, it is required for a mail server to have a valid reverse dns record. But it doesn't have to point back to the same name. It would lead to very very poor IP space usage - eg. virtual hosting provider, which has 300 domains would need 300 IP's even if all of them are hosted on 1 machine, and number of domains can MUCH higher than all of the IPs. mail.domainA.com - WW.XX.YY.ZZ ZZ.YY.XX.WW.in-addr.arpa PTR - host.domainB.com host.domainB.com - WW.XX.YY.ZZ for an egzample one of the bigest portals - yahoo: dig yahoo.com MX - mx1.mail.yahoo.com - 67.28.113.10, 67.28.113.11 dig 10.113.28.67.in-addr.arpa PTR - mta-v4.level3.mail.yahoo.com. dig mta-v4.level3.mail.yahoo.com. - 67.28.113.10 Citation from one of the mail server manuals: If you have a PTR record for your IP address, and the target of the PTR record has an A record pointing back to that same IP address, mail will not be rejected from your server due to an invalid PTR. -- Pozdrowienia, Robert Kurjata _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc