Hi there I just want to know some opinions on the following DNS Setup for a mail server:
# host -t MX example.com example.com mail is handled by 100 mail.example.com. # host mail.example.com mail.example.com is an alias for hostname.example.com. hostname.example.com has address 1.2.3.4 # host 1.2.3.4 4.3.2.1.in-addr.arpa domain name pointer hostname.example.com. The mailserver (postfix) connects saying it is hostname.example.com. Should this be a correct setup? One partner we want to send mails to does BOUNCE mails with 554 5.7.1 DNS Blacklisted by in-addr.arpa (in reply to MAIL FROM command) Do you think this is correct? I think this also prevents from getting mail from googlemail: [EMAIL PROTECTED]:~$ host -t MX googlemail.com googlemail.com mail is handled by 5 gmail-smtp-in.l.google.com. googlemail.com mail is handled by 10 alt1.gmail-smtp-in.l.google.com. googlemail.com mail is handled by 10 alt2.gmail-smtp-in.l.google.com. googlemail.com mail is handled by 50 gsmtp147.google.com. googlemail.com mail is handled by 50 gsmtp183.google.com. [EMAIL PROTECTED]:~$ host gmail-smtp-in.l.google.com. gmail-smtp-in.l.google.com has address 209.85.129.27 gmail-smtp-in.l.google.com has address 209.85.129.114 [EMAIL PROTECTED]:~$ host 209.85.129.27 27.129.85.209.in-addr.arpa domain name pointer fk-in-f27.google.com. Is this true? Regards Sebastian Ries -- ------------------------------------------------------------ DT Netsolution GmbH - Talaeckerstr. 30 - D-70437 Stuttgart Tel: +49-711-849910-36 Fax: +49-711-849910-936 WEB: http://www.dtnet.de/ email: [EMAIL PROTECTED]
