Matt,
We just recently turned SMTP Auth on, "out of the blue" so to speak. We
used the "Relay for Addresses" option and it works great for our users in
our two /24 blocks, so far as to not necessitate any changes on their end.
POP3 mail receiving is not an issue. However, POP3 users who do not connect
via your /21 block will need to set up their email clients to log in to your
SMTP server. In Outlook Express this is done by checking the "My Server
Requires Authentication" box under the Outgoing Mail Server section of the
Servers tab of the email accounts property screen (is that enough of a
mouthful). The process is almost identical for Outlook 2000. I have not
set it up on any other mail client.
The only problem I have seen with this scenario is an isolated case where a
web/email hosting customer is dialing in via a foreign ISP and is behind a
3Com NAT firewall. In that instance, I had the users configure their
outgoing mail server to be the SMTP server of their dial-up ISP.
Hope this helps.
John Worth Wiles
Vice President of Network Operations
River City Online, Inc.
112R Church Street
Elkin, NC 28621
[EMAIL PROTECTED]
1 (336) 526-7286 Voice
1 (336) 526-7287 Fax
----- Original Message -----
From: "Matt Walkowiak" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Thursday, August 16, 2001 10:29 AM
Subject: RE: [IMail Forum] Turning on SMTP Auth out of the blue...
See below for the full message...
>> My question is, if I turn SMTP Auth on out of the blue, will that cause
any
>> noticeable effect to any of my customers that still CAN send e-mail off
of
>> me?
>
> no effect really, they just won't be able to send any mail. :))
Ok, my company owns a /21 block of IP addys, lets say xxx.xxx.120-127.xxx.
I'd like all of these computers to be able to send e-mail off of my Imail
computer, and I assume the best way to do that is with relay for addresses.
I also would like anyone else that has a pop3 account with me to be able to
send mail off of my server (one COMPLETE set of instructions, where I can
tell my users to enter X (and Y) into the fields, rather than telling them
to contact their ISP...) and I assume I do that with SMTP Auth.
If I turn SMTP Auth on, will that make it difficult for people to be allowed
to send mail using relay for addresses? can they both co-exist in a nice
friendly fashion? I'm getting lots of pressure to turn smtp auth on, but I
don't want to turn it on if it breaks my other working connections...
thanks again!
Matt
-----Original Message-----
From: Len Conrad [mailto:[EMAIL PROTECTED]]
Sent: Thursday, August 16, 2001 6:36 AM
To: [EMAIL PROTECTED]
Subject: Re: [IMail Forum] Turning on SMTP Auth out of the blue...
>When we built our Imail server a few years ago, all of our customers bought
>internet access thru us, so we limited who could send mail by only allowing
>a certain range of IP addy's to send / relay messages.
relay for addresses
>Since then we have sold that portion of our business, but most of the
e-mail
>boxes stayed with us. Since their IP's changed, they now cannot send mail
>off of me. What I have been telling them is to call their local ISP and
ask
>them for the SMTP information.
good idea. they should relay out through their access provider
>My question is, if I turn SMTP Auth on out of the blue, will that cause any
>noticeable effect to any of my customers that still CAN send e-mail off of
>me?
no effect really, they just won�t be able to send any mail. :))
>Will my customers have to change their e-mail clients if they are
>working fine now?
yes, go here: http://www.mailops.com, Robert Fehn�s most excellent site,
and click Help:SMTP AUTH for the gory details.
>What else can I expect?
Dealing with people, expect the worst, hope for the best ?
Len
http://MenAndMice.com/DNS-training
http://BIND8NT.MEIway.com : ISC BIND 8.2.4 for NT4 & W2K
http://IMGate.MEIway.com : Build free, hi-perf, anti-abuse mail gateways
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