Re: OK, I must be retarded or something...

1. You can't disable anonymous authentication, as that is what all other
mail servers will use to send mail to your server. This would result in all
inbound mail being halted, as you experienced. Requiring TLS will result in
the same experience of inbound mail being halted.

2. For POP3 clients (that relay via SMTP), you should leave the relay
defaults enabled, which are "Only the list below", and "allow computer that
authenticate" check box checked. This allows clients that authenticate to
send via your server without opening relaying to anyone. If you want
additional security, you can try enabling Windows Authentication on the SMTP
server, and then setting the Outlook clients to use Secure Password
Authentication (SPA). You can also set up SSL on the POP3 virtual server
and the SMTP Virtual Server, but you won't want to require SSL on the SMTP
VS unless you create a separate one specifically for your POP3 clients.

--
Ben Winzenz
Exchange MVP
MessageOne


"Harry Bates" <None> wrote in message
news:OlrmwfadFHA.1292@xxxxxxxxxxxxxxxxxxxxxxx
> OK, I must be retarded or something. I am having the hardest time setting
> up
> POP3 mail for external users. When I do, eithe it halts all mail with no
> immediate return messages or it only allows delivery from an internal user
> to an internal user. I obviously do not want to have the relay open. That
> is
> understood. Here are the latest sub-genius steps I have done with no
> avail.
>
> Exchange 2003 over 2003 native\native AD domain
>
> All done under properties of <Server>\SMTP:
> 1. Accesss tab, Authentication button. Anonymous unchecked, Basic
> Authentication checked, and the default domain is listed correctly. Just
> for
> testing I did not use TLS encryption. (is this absolutely necessary to
> make
> it work?)
>
> 2. Click OK, then go to the Relay button. Click the radio button ON for
> "All
> except the list below" and obviously radio button OFF for "Only the list
> below".
>
> 3. Stop and restart SMTP service to make sure seetings take effect.
>
> 4. On the Outlook clients I set "Server requires Auth..." & "Use same
> username and password..."
>
> At this point no mail travels. What am I doing wrong. All of the other
> settings are basically default, and there are no connnectors set up.
> Thanks
> for your anticipated help because I am new to the whole Exchange and mail
> server thing.
>
>
>
> -Harry Bates
>
>
>


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