test smtp manually

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From: Bill Campbell <bill@celestial.com>
Subject: Re: testing smtp connection
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Date: Sat, 7 Oct 2000 20:03:50 GMT
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On Sat, Oct 07, 2000 at 10:41:45AM -0400, - bill - wrote:
>My daughter who is remotely located (thank goodness) just started having
>trouble sending mail through my server.  She can get mail just fine.
>When she tries to send the mail she gets an error message (not exact -
>not my fault) about the server being down.

This may well be anti-relay logic in your mailer designed to prevent third-
party mail relays.  I can't speak to SCO's MMDF or sendmail configuration
since we have always replaced them with smail-3.2.

It can be a bit tricky to allow legitimate off-site users to send mail
through a server.  The way we handle it is using the whosond server which
requires modified POP and IMAP servers.  When a remote user properly
authenticates to read mail with one of these servers, they notify the
WHOSON server which marks their connecting IP address as legitimate for
some period of time.  The MTA (sendmail, mmdf, etc.)  then checks the
whosond server when a relay is requested, and allows the relay if the
server shows that the IP address is legitimate.

This works well with most mail clients which use POP or IMAP since they
normally check mail immediately when started thus authorizing relays from
the connecting IP address.  The only consideration is that the mail
client's time to poll for new messages must be less than the timeout
interval configured for the whosond daemon.

Bill
--
INTERNET:  bill@Celestial.COM   Bill Campbell; Celestial Software LLC
UUCP:              camco!bill   PO Box 820; 6641 E. Mercer Way
FAX:           (206) 232-9186   Mercer Island, WA 98040-0820; (206) 236-1676
http://www.celestial.com/

You need only reflect that one of the best ways to get yourself a
reputation as a dangerous citizen these days is to go about repeating
the very phrases which our founding fathers used in the struggle for
independence.
        -- Charles A. Beard

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