Re: What's going on with port 25

Tech-Archive recommends: Fix windows errors by optimizing your registry

Is Embarq your ISP?

Post any error messages you're getting (when you attempt to Send a message using your Mail Client) in their entirety.
--
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Desktop Experience - since 2002
AumHa VSOP & Admin http://aumha.net
DTS-L http://dts-l.net/


DavidLloyd wrote:
embarq for embarqmail.
Dave

"N. Miller" wrote:

On Sat, 31 May 2008 06:43:00 -0700, DavidLloyd wrote:

"N. Miller" wrote:

On Thu, 29 May 2008 15:55:17 -0700, DavidLloyd wrote:

Is there anyway I can tell if a program other than my email program is
blocking port 25?

An email program will not block any ports. It just uses them.

To tell if you can get to a remote server through port 25, use the Telnet
command at a command prompt: 'Telnet smtp.example.org 25'. Use your
normal SMTP message submission server. Post back the results.

Thanks for the help. I got the following message when I tried the Telnet
"Could not open connection to the host, on port 25: connect failed"

Telnet was unable to connect to port 25.

I have tried sending out emails on both outlook express and outlook, both
with smtp port 25 on the outgoing. I am assuming that something is
blocking port 25. I am receiving emails on 110 just fine.

Many U.S. ISPs are blocking port 25 outbound, except to their own message
submission servers, as a matter of preventing the propagation of spam from
compromised user computers on their networks. It is really pretty
effective; when SBC rolled out their port 25 block (late 2004, early
2005), 'bot spam from their network declined significantly.

Comcast will impose a port 25 block via a modem configuration file, upon
evidence of abuse.

If the server you are trying to reach will not accept connections for
message submission through port 587, or port 465, you may need to consider
a different approach. To assist you in how to handle this, it would help to
know:

Who is your ISP? Whose email service are you trying to use?

--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum

.

Relevant Pages

  • Re: MTA besides sendmail?
    ... my ISP using SSL over port 465 and that can be used with a mail client ... relaying with a username and pass via port 465 through SSL. ... My ISP blocks all attempts to send email to other port 25 SMTP ...
    (comp.os.linux.networking)
  • Re: Making users to use port 587 for submission emails
    ... > My ISp doesn't block port 25, but I'd like to have things like ... the user's mail client yourself if that's feasible. ...
    (Fedora)
  • Re: Current status?
    ... You would still need to know who your MTA is ... justification for allowing anybody to use port 25. ... to the problem of how to get the email system to be more immune to SPAM. ... your ISP should never allow you ...
    (comp.os.vms)
  • Re: SMTP Server for outgoing only behind a home router
    ... They cliam to ONLY block port 80 to keep me from ... you will get a 220 greeting line from the remote SMTP server: ... So AOL.COM methods stops legitimate roaming users from using ESMTP AUTH to ... So look to see of your ISP supports ESMTP AUTH for dynamic IP users and/or ...
    (microsoft.public.inetserver.iis.smtp_nntp)
  • Re: Current status?
    ... spam will not stop because you start blocking port 25. ... I still won't use the idiots running the ISP for my mail. ...
    (comp.os.vms)