On 16 Dec 99, at 19:37, Oscar Rau wrote:
> I have a question about ports. When you access some server you get
> a connection back on a different port. For example, Netscape server
> is on port 80 and it comes back to a different port on the client.
>
> My mail server is on port 25. When the mail goes out, the relay
> server connects back on port 1590 and 113. Why is this done? Is it
> some form of acknowledgement or authentication?
The connection to your port 113 is looking for authd to confirm
what user is making the connection. If your firewall blocks this, or
if your system doesn't respond because it's not running authd, most
SMTP servers will time out and proceed without it.
David G
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