Hi Everyone,

I seem to having some strange issues with my new sendmail server and was hoping that somebody can offer some assistance with this issue.

I recently tried to setup an enviromental monitor that sends alerts via email using a dedicated email account I created on my sendmail server. For whatever reason, it does not seem to be able to send emails, and I have verified the account credentials multiple times.

So I attempted to run a telnet SMTP test to determine what the problem was. I was able to connect and send the emails using this test perfectly fine from my local subnet, however I ran into problems attempting this test from the outside world.

When I connect the SMTP PORT 25 from the outside world, I get what seems to be a malformed SMTP greeting.

After I recieve this greeting, I cannot type any of the required test commands. (eg. ehlo, helo, mail from:, rcpt to. Not even the "quit" command will work, I have to terminate my shell.

If I connect from the local subnet, I get the standard (proper) greeting, and things go smoothly.

I am receiving emails from outside world to this mail server, so I'm stumped as to what this problem may be.

Any assistance would be very much appreciated.


Thanks in advance

Hi -

The firewall is disallowing SMTP connections. For example, it might be a Cisco router with "mailguard" enabled. Or "Watchguard, or Sonicwall, or Raptor, or a dozen others...."

'Hope that helps .. PSM

Hi, stlouis79 -

You marked the post "solved".

Q: So how did you solve it?