Reverse lookups in sendmail
Hi, Any ideas of how to avoid having sendmail trying to do reverse lookup on hosts trying to relay through it? Cause when hosts on my network want to send an email, since I dont have bind installed and we use the DNS servers at our ISP, it takes alot for the MUA to finish talking to the MTA(since you have to wait until the reverse lookup fails (sendmail tries at least 4 times before quiting) and then it sends your email). Thanks, Raul
On Thu, 4 Sep 2003, Raúl Gutiérrez Segalés wrote:
Hi,
Any ideas of how to avoid having sendmail trying to do reverse lookup on hosts trying to relay through it? Cause when hosts on my network want to send an email, since I dont have bind installed and we use the DNS servers at our ISP, it takes alot for the MUA to finish talking to the MTA(since you have to wait until the reverse lookup fails (sendmail tries at least 4 times before quiting) and then it sends your email).
Yikes... I was using a public ip address range for my internal network, switch to a reserved range and sendmail flies.. who decides when to do reverse lookup depending whether you have a reserved ip or not: sendmail or the resolver ?
Thanks,
Raul
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The 03.09.04 at 17:43, Raúl Gutiérrez Segalés wrote:
Any ideas of how to avoid having sendmail trying to do reverse lookup on hosts trying to relay through it? Cause when hosts on my network want to send an email, since I dont have bind installed and we use the DNS servers at our ISP, it takes alot for the MUA to finish talking to the MTA(since you have to wait until the reverse lookup fails (sendmail tries at least 4 times before quiting) and then it sends your email).
As I don't have sendmail installed now, I can not check. But I think there is a switch in the suse configuration file(s) that governs that. Then running suseconfig would apply it - that is, if you are using the default sendmail. -- Cheers, Carlos Robinson
On Fri, 5 Sep 2003, Carlos E. R. wrote:
The 03.09.04 at 17:43, Raúl Gutiérrez Segalés wrote:
Any ideas of how to avoid having sendmail trying to do reverse lookup on hosts trying to relay through it? Cause when hosts on my network want to send an email, since I dont have bind installed and we use the DNS servers at our ISP, it takes alot for the MUA to finish talking to the MTA(since you have to wait until the reverse lookup fails (sendmail tries at least 4 times before quiting) and then it sends your email).
As I don't have sendmail installed now, I can not check. But I think there is a switch in the suse configuration file(s) that governs that. Then running suseconfig would apply it - that is, if you are using the default sendmail.
Actually not, it is compiled from the source. But thanks anyways.
-- Cheers, Carlos Robinson
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participants (2)
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Carlos E. R. -
Raúl Gutiérrez Segalés