LFS Mail Problem?

Bruce Dubbs bdubbs at swbell.net
Fri May 14 21:58:22 PDT 2004


Jeremy Utley wrote:

>Bruce, I think I would definately look at some form of a port 25 block,
>especially if you can SSH to belgarath but not access the SMTP port.
>Blocking outgoing port 25 is becoming so widespread these days, it makes
>it a pain for those of us who *LIKE* to run our own SMTP servers :)
>

Never attibute to malice what can be explained by stupidity.

I think its the network admins down at our school.  The system has been 
working fine for over a year.  Now the messages are being blocked.  They 
have a way of changing things on Friday afternoons and not telling the 
sysadmins.

I can ssh into the server.   I can ssh out of the server to lfs.  I 
cannot telnet out of the mail server on port 25 to anybody.  The system 
is in DNS as a mail server:

# dig venus.sac.accd.edu mx
 
; <<>> DiG 9.2.2 <<>> venus.sac.accd.edu mx
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63699
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
 
;; QUESTION SECTION:
;venus.sac.accd.edu.            IN      MX
 
;; ANSWER SECTION:
venus.sac.accd.edu.     4035    IN      MX      30 venus.sac.accd.edu.
 
;; AUTHORITY SECTION:
accd.edu.               6968    IN      NS      ns1.swbell.net.
accd.edu.               6968    IN      NS      ns2.swbell.net.
 
;; ADDITIONAL SECTION:
venus.sac.accd.edu.     4035    IN      A       209.184.119.47
ns1.swbell.net.         6713    IN      A       151.164.1.1
 
;; Query time: 12 msec
;; SERVER: 151.164.17.201#53(151.164.17.201)
;; WHEN: Fri May 14 23:53:28 2004
;; MSG SIZE  rcvd: 130

==============

I don't think its a swbell problem.  I now think district network admins 
are blocking port 25 outbound.  Thanks for the debug help!

  -- Bruce





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