Re: SMTP (Outbound) Message

Your firewall is blocking ehlo verbs.

SMTP mail cannot be sent or cannot be received in Exchange Server
http://support.microsoft.com/kb/895857/en-us


James Chong (MVP)
MCSE | M+, S+, MCTS, Security+
msexchangetips.blogspot.com

On Mar 23, 1:28 pm, Chris Smith <inraindre...@xxxxxxxxxxx> wrote:
Hello,

We are having trouble with certain messages deliverying to other domains on
the Internet. A telnet test from the Exchange server to multiple SMTP servers
(mx3.hotmail.com, etc.) show the following and will not accept HELO:

220
***************************************************************************­*
***************************************************************************­*****
***************************************************************************­*****
**********************************************************************

I understand this is because of a firewall issue. My question is: Why does
some mail deliver correctly and other mail sits in the queue... unable to
make a good connection to the receiving SMTP server.
--
CSS


.

Relevant Pages

  • Re: [fw-wiz] appropriate response for mail break-in
    ... > (and I am still receiving them as of a minute ago). ... > number that connected to your SMTP server to deliver the mail (the first ... > the sender is on the outside of firewall and comes from the sending MTA ... a host performing SMTP need not have any DNS ...
    (Firewall-Wizards)
  • Re: Connection Filtering
    ... I was thinking you were filtering from outside your LAN. ... If all SMTP traffic is being directed to your Firewal/SMTP appliance then I assume you are NAT'ing port 25 to the internal IP of your Exchange Server? ... > external spam firewall that processes all mail. ...
    (microsoft.public.exchange.admin)
  • Re: Issues sending outside email after internal to 2 servers worki
    ... The exchange server can perform name resolution properly? ... What address space did you enter on the connector to your other mail ... delay in receiving the email on the outside world? ... You can't tell from the SMTP queues ...
    (microsoft.public.exchange.setup)
  • Re: Netgear routes cant send SMTP logs any longer
    ... I used to have 3 netgear firewall boxes send me the logs daily ... by SMTP but that has stopped working. ... the Exchange server and it looks like it makes it through HELO, MAIL FROM, ... So, if the response to the RCPT TO command is "250", and the firewall ...
    (microsoft.public.exchange.admin)
  • Re: Cannot send mail to "some" domains
    ... I was able to test SMTP from the Exchange server and was able to connect and ... I currently find 4 Recipient Policies. ... SMTP connector between the two boxes. ... of anyone not receiving inbound emails at this time. ...
    (microsoft.public.exchange.admin)