Re: Receive, but can't send
From: Vanguard (see_signature)
Date: 01/14/05
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Date: Thu, 13 Jan 2005 19:56:17 -0600
"RJB" <RJB@discussions.microsoft.com> wrote in message
news:032EACB7-4A1C-4AAB-9FE5-17F9BE416E43@microsoft.com...
> Typing: ehlo rjbhome
> gave me:
>
> 250-mail28.sea5.speakeasy.net
> 250-PIPELINING
> 250-size 20971520
> 250-STARTTTLS
> 250-AUTH LOGIN PLAIN
> 250-8 BITMIME
>
> Typing mail from:<yourname@yourdomain.com>
> gave me:
> ok
Looks like you're getting in okay to the SMTP server. Presumably you
specified the mail server's IP name instead of its IP address in the
telnet command so you also know the DNS lookup worked okay.
> I assumed you meant do the following from the Prozy Server, and not
> from a
> client PC:
The "DNS Client" NT service runs on the client PC as part of the
operating system. Your client PC still has to do the IP lookup to use
that to make the connection through the proxy. I'm not sure why your
proxy would also have to do the DNS lookup since it would be getting
passed an IP address from the client.
Since the above telnet into the mail server worked okay, and presumably
you used an IP name for the mail server, the problem wasn't with an
outdated IP lookup in the local DNS cache or a redirect in the hosts
file (I'm assuming that speakeasy.net is the domain for the mail server
you wanted to use).
> COuld it be a network card on the Proxy Server? I mean, obviously, if
> POP3
> and Internet are working, the Server is working, right?
Depends on what protocols are supported or passed by the proxy server.
Maybe it is configured to block SMTP traffic. Are YOU running the proxy
locally? Is the proxy connecting to your ISP's SMTP server (so you are
using the mail server on the network to which you connect) or are you
attempting to connect to some other-domain SMTP server (which means you
are trying to pass SMTP traffic over their domain and out of their
control)? If you are using some public proxy that isn't on your e-mail
provider's domain, they may not accept off-domain SMTP traffic or that
public proxy is on a DNSBL (DNS blacklist) as an open relay that is
getting abused by spammers.
Can you circumvent the proxy and make a direct connect to your SMTP
server? If the proxy is required on your corporate network then maybe
they don't want employees to be sending e-mails other than from their
domain so you have to use your company's mail server. Just where is
this proxy, who owns it, who manages it, is it on your domain, your
ISP's domain, or some other domain? Why do you need to use the proxy
for SMTP traffic?
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