Help Needed: My RHEL5 box suddenly stopped accepting e-mails
mjelists at gmail.com
Sun May 8 06:21:53 UTC 2011
On Sat, May 7, 2011 at 10:21 PM, Bohdan Sydor <bohdan at harazd.net> wrote:
> On 05/08/2011 06:30 AM, Mun wrote:
> > Does everything above look okay?
> Yes, they all seem to be alright.
> Next, let's try to telnet to the smtp port:
> - from the localhost. Simply telnet localhost 25 and try to submit a
> sample msg.
You are now beyond my understanding of sendmail. After telnetting,
what is the command I should enter?
> - from any other machine that is in the same subnet as the mail server
> >From any other remote hosts we already know that it fails. But do you
> refer to the MTA by address or by name? Check the DNS entries for the MTA:
> host -t mx yourDomainName
This returned a name (not an address). Let say "xyz1.domain"
> host -t a theResultNameFromPreviousCmd
> Is it the same IP as assigned to the server?
Yes, the IP does match that of "xyz1.domain"
But this piqued my interest, and when I look in sendmail.cf I see the
# "Smart" relay host (may be null)
Should this entry be "xyz1.domain" (to match the the 'host -t mx' command's
Or is it okay that the line in sendmail.cf refers to a different server?
> Bohdan Sydor
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