Starting a few days ago, a few of my users have reported that they have
been unable to receive email at my mail1 server from certain domains.
My uptime was about 180 days and do not recall making any recent
changes to my config (sendmail or DNS)

A check of the problem showed that when I telnet to mail1 from mail2
(at another location)
telnet mail1.domain.com 25
it consistently takes 65 seconds to get the greeting:
220 ns1.galacticnet.com ESMTP Sendmail 8.13.6/8.13.6
telnet to port 23 is instantaneous and mail1 consistently has over 90%
idle time

If I telnet to the mail1 server from the mail1 server:
telnet localhost 25
the response is instantaneous!
I had my ISP telnet to mail1 from only 1 hop away, and the get the same
65 second delay!

I had not been using GreetPause but today have added it to mail1 server
mail1.mc now has:
FEATURE(`greet_pause',`500')dnl
and
mail1 access now has
GreetPause:_ip_of_mail2 100
GreetPause:_ip_of_mail1 15000
However, there is no change in the times to get the greetings
Still 65 seconds from mail2 to mail1 and still instantaneous from mail1
to mail1

Any ideas where the delay has come from or how to get rid of it.

I am getting some mail at mail1 and some mail goes to my secondary
mail2 server, but users are reporting that some is getting bounced.

google.com@galacticnet.com writes:

> Starting a few days ago, a few of my users have reported that they have
> been unable to receive email at my mail1 server from certain domains.
> My uptime was about 180 days and do not recall making any recent
> changes to my config (sendmail or DNS)
>
> A check of the problem showed that when I telnet to mail1 from mail2
> (at another location)
> telnet mail1.domain.com 25
> it consistently takes 65 seconds to get the greeting:
> 220 ns1.galacticnet.com ESMTP Sendmail 8.13.6/8.13.6
> telnet to port 23 is instantaneous and mail1 consistently has over 90%
> idle time
>
> If I telnet to the mail1 server from the mail1 server:
> telnet localhost 25
> the response is instantaneous!
> I had my ISP telnet to mail1 from only 1 hop away, and the get the same
> 65 second delay!
>
> I had not been using GreetPause but today have added it to mail1 server
> mail1.mc now has:
> FEATURE(`greet_pause',`500')dnl
> and
> mail1 access now has
> GreetPause:_ip_of_mail2 100
> GreetPause:_ip_of_mail1 15000
> However, there is no change in the times to get the greetings
> Still 65 seconds from mail2 to mail1 and still instantaneous from mail1
> to mail1
>
> Any ideas where the delay has come from or how to get rid of it.
>
> I am getting some mail at mail1 and some mail goes to my secondary
> mail2 server, but users are reporting that some is getting bounced.

Below please find set of "warm up" questions/tests:

* Which DNSBL do you use?
[Some people have reported problems/delays caused by end of ORDB.]
* What ident query timeout do you use?
grep Timeout.ident /etc/mail/sendmail.cf
[ newer sendmail versions use 5s default older use 30s ]
* Is your sendmail compiled with tcp-wrappers?
AFAIK the library may use RFC blessed 30s timeout for ident
/usr/sbin/sendmail -d0.1 -bv root | grep TCPWRAPPERS
* How long does it take to resolve ip address of mail2 at mail1?
nslookup aaa.bbb.ccc.ddd

--
[pl>en: Andrew] Andrzej Adam Filip : anfi@priv.onet.pl : anfi@xl.wp.pl
Before You Ask: http://anfi.homeunix.net/sendmail/B4UAsk-Sendmail.html
http://anfi.homeunix.net/sendmail/ [orkut,linkedin,xing]

On Jan 25, 5:11 pm, Andrzej Adam Filip <a...@onet.eu> wrote:
> google....@galacticnet.com writes:
> > Starting a few days ago, a few of my users have reported that they have
> > been unable to receive email at my mail1 server from certain domains.
> > My uptime was about 180 days and do not recall making any recent
> > changes to my config (sendmail or DNS)
>
> > A check of the problem showed that when I telnet to mail1 from mail2
> > (at another location)
> > telnet mail1.domain.com 25
> > it consistently takes 65 seconds to get the greeting:
> > 220 ns1.galacticnet.com ESMTP Sendmail 8.13.6/8.13.6
> > telnet to port 23 is instantaneous and mail1 consistently has over 90%
> > idle time
>
> > If I telnet to the mail1 server from the mail1 server:
> > telnet localhost 25
> > the response is instantaneous!
> > I had my ISP telnet to mail1 from only 1 hop away, and the get the same
> > 65 second delay!
>
> > I had not been using GreetPause but today have added it to mail1 server
> > mail1.mc now has:
> > FEATURE(`greet_pause',`500')dnl
> > and
> > mail1 access now has
> > GreetPause:_ip_of_mail2 100
> > GreetPause:_ip_of_mail1 15000
> > However, there is no change in the times to get the greetings
> > Still 65 seconds from mail2 to mail1 and still instantaneous from mail1
> > to mail1
>
> > Any ideas where the delay has come from or how to get rid of it.
>
> > I am getting some mail at mail1 and some mail goes to my secondary
> > mail2 server, but users are reporting that some is getting bounced.
Below please find set of "warm up" questions/tests:
>
> * Which DNSBL do you use?
I just removed all DNSBL from my .mc file (I'll use the divide and
conquer method and will put them back when it is working)
> [Some people have reported problems/delays caused by end of ORDB.]
> * What ident query timeout do you use?
> grep Timeout.ident /etc/mail/sendmail.cf
#O Timeout.ident=5s

> [ newer sendmail versions use 5s default older use 30s ]
> * Is your sendmail compiled with tcp-wrappers?
> AFAIK the library may use RFC blessed 30s timeout for ident
> /usr/sbin/sendmail -d0.1 -bv root | grep TCPWRAPPERS
TCPWRAPPERS USERDB XDEBUG
> * How long does it take to resolve ip address of mail2 at mail1?
> nslookup aaa.bbb.ccc.ddd
the response is instantaneous
>
Thanks for your so far. mail1 and mail2 both have almost
identical configs.
Both are running FreeBSD 6.1 I am in the process of cvsup to 6.2

> --
> [pl>en: Andrew] Andrzej Adam Filip : a...@priv.onet.pl : a...@xl.wp.pl
> Before You Ask:http://anfi.homeunix.net/sendmail/B4....net/sendmail/[orkut,linkedin,xing]- Hide quoted text -- Show quoted text -

SOLVED!!!!

It was DNSBL

On Jan 25, 6:10 pm, google....@galacticnet.com wrote:
> On Jan 25, 5:11 pm, Andrzej Adam Filip <a...@onet.eu> wrote:
>
>
>
> > google....@galacticnet.com writes:
> > > Starting a few days ago, a few of my users have reported that they have
> > > been unable to receive email at my mail1 server from certain domains.
> > > My uptime was about 180 days and do not recall making any recent
> > > changes to my config (sendmail or DNS)
>
> > > A check of the problem showed that when I telnet to mail1 from mail2
> > > (at another location)
> > > telnet mail1.domain.com 25
> > > it consistently takes 65 seconds to get the greeting:
> > > 220 ns1.galacticnet.com ESMTP Sendmail 8.13.6/8.13.6
> > > telnet to port 23 is instantaneous and mail1 consistently has over 90%
> > > idle time
>
> > > If I telnet to the mail1 server from the mail1 server:
> > > telnet localhost 25
> > > the response is instantaneous!
> > > I had my ISP telnet to mail1 from only 1 hop away, and the get the same
> > > 65 second delay!
>
> > > I had not been using GreetPause but today have added it to mail1 server
> > > mail1.mc now has:
> > > FEATURE(`greet_pause',`500')dnl
> > > and
> > > mail1 access now has
> > > GreetPause:_ip_of_mail2 100
> > > GreetPause:_ip_of_mail1 15000
> > > However, there is no change in the times to get the greetings
> > > Still 65 seconds from mail2 to mail1 and still instantaneous from mail1
> > > to mail1
>
> > > Any ideas where the delay has come from or how to get rid of it.
>
> > > I am getting some mail at mail1 and some mail goes to my secondary
> > > mail2 server, but users are reporting that some is getting bounced.Below please find set of "warm up" questions/tests:
>
> > * Which DNSBL do you use?I just removed all DNSBL from my .mc file (I'll use the divide and
> conquer method and will put them back when it is working)> [Some people have reported problems/delays caused by end of ORDB.]
> > * What ident query timeout do you use?
> > grep Timeout.ident /etc/mail/sendmail.cf#O Timeout.ident=5s
>
> > [ newer sendmail versions use 5s default older use 30s ]
> > * Is your sendmail compiled with tcp-wrappers?
> > AFAIK the library may use RFC blessed 30s timeout for ident
> > /usr/sbin/sendmail -d0.1 -bv root | grep TCPWRAPPERSTCPWRAPPERS USERDB XDEBUG> * How long does it take to resolve ip address of mail2 at mail1?
> > nslookup aaa.bbb.ccc.dddthe response is instantaneousThanks for your so far. mail1 and mail2 both have almost
> identical configs.
> Both are running FreeBSD 6.1 I am in the process of cvsup to 6.2
>
>
>
> > --
> > [pl>en: Andrew] Andrzej Adam Filip : a...@priv.onet.pl : a...@xl.wp.pl
> > Before You Ask:http://anfi.homeunix.net/sendmail/B4...ttp://anfi.hom...[orkut,linkedin,xing]- Hide quoted text -- Show quoted text -- Hide quoted text -- Show quoted text -- Hide quoted text -- Show quoted text -