The receiving MTAs care about the rDNS of the machine which has connected. In your case that is apparently a tertiary Mx record. It need not be an Mx record at all, the requirement is a valid[1] rDNS entry.
[1] A definition which changes with ones level of spam zealotry. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of April Fleming Posted At: Thursday, July 01, 2004 10:26 AM Posted To: swynk Conversation: MX records and Reverse DNS lookup Subject: MX records and Reverse DNS lookup It is my understanding that many email servers will do a reverse dns lookup on incoming email to ensure a valid domain when sifting out spam etc. Thus, I must ensure that my email server which is sending out email must have an MX record so the Reverse DNS lookup will suceed. What I would like to know is whether the weight given the MX record will affect the reverse dns lookup. If I have email being sent from email server 3 (don't ask why, it isn't the point :) and that email server is weighted 15, will the email servers I am sending out to accept the email? Example MX 5 Email server 1 MX 10 Email server 2 MX 15 Email server 3 _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang=english To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with.
