[Services] Sendmail outbound on mail.atl.bellsouth.net
I have a sendmail host on one of the static IPs on my BellSouth DSL..
I can't seem to find the correct comination of entries for it send outbound mail to a couple of domains. In looking at the sendmail.cf I have the DS record set to mail.atl.bellsouth.net and if I look at the mailog I see that it is connecting to the first MX for that domain but it is timing out. stat=Deferred: Connection timed out with mx01.mail.bellsouth.net.
Since I am only attempting to relay outbound, I have this setup up simular to the Eudora on my PC that is using a different IP in the static range by otherwide is able to sendmail.
Form both systems a telnet mail.atl.bellsouth.net 25 get's back what looks like a proper 220 hello message.
Trying 207.115.11.17... Connected to mail.atl.bellsouth.net (207.115.11.17). Escape character is '^]'. 220 isp.att.net - Maillennium ESMTP/MULTIBOX frfwmhc05 #74
# "Smart" relay host (may be null) DS[mail.bellsouth.net]
That has worked for me for years. Don't forget the [brackets], as otherwise the BellSouth/AT&T mail server will not accept your relay request.
-- History does not long entrust the care of freedom to the weak or the timid. -- Dwight D. Eisenhower The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants. -- Thomas Jefferson
I had tried that but without the [] on it. Now I need to find my sendmail book and read up on what the brackets do .. Been way to long since I played with this..
I had tried that but without the [] on it. Now I need to find my sendmail book and read up on what the brackets do .. Been way to long since I played with this..
Thanks again --
Without the brackets, sendmail does a DNS lookup for the associated MX record. The mail.bellsouth.net servers do not accept relaying on their MX servers, only on the SMTP server. The brackets will force an A record lookup instead of an MX record lookup.
The MS SMTP service has a similar problem, but it does not support [brackets] around a hostname, so I had to create a local hostname with A records in my DNS server that point to the IP addresses used by mail.bellsouth.net, and use that local hostname for the smart host relay for my MS SMTP server. That would also work for sendmail, but since it does accept [brackets] around the hostname, it would be more work than needed.
Here are some DNS query results to show what I mean:
;; QUESTION SECTION: ;mail.bellsouth.net. IN ANY
;; ANSWER SECTION: mail.bellsouth.net. 5874 IN MX 0 mx01.mail.bellsouth.net. mail.bellsouth.net. 5874 IN MX 0 mx00.mail.bellsouth.net. mail.bellsouth.net. 7091 IN A 207.115.11.17 mail.bellsouth.net. 7091 IN A 204.127.217.17
;; QUESTION SECTION: ;att-mail.dcs-net.net. IN ANY
;; ANSWER SECTION: att-mail.dcs-net.net. 3601 IN A 204.127.217.17 att-mail.dcs-net.net. 3601 IN A 207.115.11.17
-- History does not long entrust the care of freedom to the weak or the timid. -- Dwight D. Eisenhower The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants. -- Thomas Jefferson
·
·
·
·