[CentOS] send mail problem on ORACLE/LInux

[nate]

[ re-sending as the original got munged I think one of the
  SMTP servers in-route(maybe mine) saw the period and stopped
  my mail there for some reason.. ]

mcclnx mcc wrote:
> I did NOT see anything wrong on /var/log/maillog.
>

Can you telnet to localhost 25 and send a mail that way ?

e.g.
 [aphro at portal:~]$ telnet localhost 25
 Trying 127.0.0.1...
 Connected to localhost.localdomain.
 Escape character is '^]'.
 220 portal.aphroland.org ESMTP Postfix (Debian/GNU)
 helo portal.aphroland.org
 250 portal.aphroland.org
 mail from: centos at linuxpowered.net
 250 2.1.0 Ok
 rcpt to: centos at linuxpowered.net
 250 2.1.5 Ok
 data
 354 End data with <CR><LF>.<CR><LF>
 Subject: hello there
 testing email
 (put a period here and hit enter)
 250 2.0.0 Ok: queued as B5F52808041
 quit
 221 2.0.0 Bye
 Connection closed by foreign host.

And see if the email arrives at the destination. It seems like
the mail server is not working right as Oracle says it's returning a 421
error code(temporary failure).

And if the telnet works, try it a second, and a third time to see
if it's consistent or not.

nate