Hi Manu
I use redhat 5.0 and in the sendmail, in DS I use my host+domain name and
its been working perfectly well and extremely fast for the last one week.
in fact this mail is sent through my Linux server and I have 100 users using
the same Linux. no complaints so far.
well I dont masquerade. but I have given again DM as host+domain name.
Like you, I tried DS of my vsnl servers, but it never worked.
I dont have an explanation for the above method, (as I am very new to Linux)
but why not try it??
Charles
-----Original Message-----
From: Manu Viswanathan <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
<[EMAIL PROTECTED]>
Date: Tuesday, April 04, 2000 12:16 PM
Subject: Re: [LIH] sendmail host name lookup failure
>Hi,
>
>I am masquerading as mantraonline.com in sendmail.cf. My mail client is
>configured to use mantraonline.com as the user domain. And I am able to
>nslookup del1.mantraonline.com while online. I tried using alternate DNS
>servers instead of Mantra's DNS server, but to no avail. sendmail still
>complained with "Deferred: Name server: del1.mantraonline.com: host name
>lookup failure". As a last ditch effort I replaced the smart relay host
>del1.mantraonline.com with its IP address and the mail did leave my
>machine. It seems that somehow sendmail is ignoring my /etc/hosts file
>and is also unable to resolve the host name del1.mantraonline.com
>through any of the nameservers I pointed my machine to. But there's
>another catch now. Although sendmail did empty the mail queue with
>DS202.56.230.1, those mails are yet to reach their destinations! Any
>thoughts anyone?
>
>Regards,
> Manu.
>
>"Ramasubramanian, Suresh" wrote:
>>
>> Better ~not~ to use DM, especially if you set the sender-domain in your
>> mailer to a totally different account - you might get antirelay bounces.
>> The mantra online problem is due to dynamic dns - sendmail ~has~ to do a
>> manual lookup of the smtp server before sending mail through it.
>>
>> 'Doze users / users of mail clients like netscape which connect directly
to
>> the mantraonline smtp server instead of having the local sendmail use
>> mantraonline as a smart relay host won't face this problem.
>>
>> I know an admin at Mantraonline, I'll enquire from him if there's any fix
>> for this. [IMHO the best fix is to use vsnl's dns instead of
mantraonline's
>> dns]
>>
>> Suresh Ramasubramanian | [EMAIL PROTECTED]
>>
>> > -----Original Message-----
>> > From: Kedar Patankar [SMTP:[EMAIL PROTECTED]]
>> > Sent: Monday, April 03, 2000 4:28 PM
>> > To: [EMAIL PROTECTED]
>> > Subject: Re: [LIH] sendmail host name lookup failure
>> >
>> > Hi,
>> >
>> > Are you "masqurading" in your sendmail? What does the DM macro in
>> > sendmail.cf say (look for ^DM in sendmail.cf)?? This relates to mails
that
>> > you send locally, directly to sendmail's output queue (w/o going to
smtp
>> > port on localhost).
>> > For mails that you send to localhost/smtp port, how is your mail
>> > client configured? In particular what is the "user domain" in pine (or
>> > whatever the corrosponding config in your mail client) set to??
>> > And yes, can you nslookup del1.mantraonline.com while you are
>> > online?
>> > I guess the mantraonline guys must have changed some DNS related
>> > config on their side, which has resulted in broken sendmail on your
side.
>> > That is not a surprise, as I have seen several isp's with broken dns
>> > setups, broken reverse lookups and so on.
>> >
>> > Regards,
>> > Kedar.
>
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