On Thu, 21 Feb 2002, tal amir wrote:

> hi,
>
> well, after all the long advantures i had with this damm mandrake machine for
> the past 2 days, there is only 1 last thing left :
>
> when sending mail (localy from the server or with a client from the local lan)
> it takes about 30 sec's for the mail to "go out" and even then its being held
> in the mqueue. to some recipients its being sent, and some get a timeout
> error...
>
> in sendmail.cf :
> # queue up everything before forking?
> # O SuperSafe=True
>
> in some cases i get an error that says "hostname lookup faild - domain.com"
> (when domain.com is the name of my mail server.

Maybe you need to setup the MX record of domain.com as well?

> there WAS a problem with my resolve.conf, but even after it was fixed,
> i still get the same errors..

How do you resolve names? Do you have a local DNS server?

>
> telneting to port 25 gives :
>
> $ telnet domain.com 25
> Trying 1.2.3.4...
> Connected to domain.com (1.2.3.4.)
> Escape character is '^]'.
> 220 domain.com ESMTP Sendmail 8.12.1/8.12.1; Thu, 21 Feb 2002 01:53:43 +0200
> helo [EMAIL PROTECTED]

helo domain.com

> 501 5.0.0 Invalid domain name
>
> WHY ?!?!

Also, at that point the server will do a reverse DNS lookup on your IP.

If I look at the headers of your message:

Received: from unknown (HELO you-domman.com) ([EMAIL PROTECTED])
  by iglu.org.il with SMTP; 21 Feb 2002 01:43:44 -0000

A reverse DNS lookup failed, and hence the "unknown". You don't expect the
mail server to rely on the name supplied by the client, do you?

>
> 1) why are messages being sent to the queue and not sent directly ?

because then need to pass some processing. If all is well, it all takes a
number of seconds (or even less).

> 2) why does it take so long for a client to connect and send mail out ?

Reverse DNS Lookup?

>
> in /etc/hosts everything is ok,

Does it have all the IPs in the local network?

Or do you use DHCP? in that case: either make the dhcp server update your
hosts file (is it possible?) or have it update your name server.

-- 
Tzafrir Cohen                        /"\
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