Possible DNS issues sending and receiving emails

[Kevin Darcy]

san jose wrote:

> I am using sendmail as SMTP on Solaris and BIND on
> solaris.Also POP3 on Solaris.
> I added the 'dns' against 'hosts' entry in
> nsswitch.conf since I was not able to send mail from
> my internal mail server account to an outside mail
> account say yahoo or hotmail.
> Now I am not able to send emails between two of my
> internal mail accounts.Also not able to receive emails
> from outside domain in my internal accounts.
> Have SMTP server server setup to use DNS.
> Pl let me know why my internal mail account cannot be
> reachable from outside.However the domain of my mail
> server is able to be resolved.

What makes you think this is a DNS problem? Are you getting bounce
messages for the failed messages saying "host unknown"? If not, I'd be
far more inclined to think this is a mail routing problem of some sort.
What do your mail logs say?


- Kevin