Why is my sendmail connection so slow (telnet)?

I just installed sendmail 8.14.1 on Solaris 9. From the solaris host,
I telnet to itself:

telnet localhost 25

It takes atleast 15 seconds (sometimes longer) to recieve a 220
response.

When I telnet to other mail servers:

telnet outgoing.verizon.net 25

It takes less than 5 seconds to recieve a 220 response.

Any ideas where to look or do to see why this is so slow?

Re: Why is my sendmail connection so slow (telnet)?

On 2007-10-21, B wrote:

> I just installed sendmail 8.14.1 on Solaris 9. From the solaris host,
> I telnet to itself:
>
> telnet localhost 25
>
> It takes atleast 15 seconds (sometimes longer) to recieve a 220
> response.
>
> When I telnet to other mail servers:
>
> telnet outgoing.verizon.net 25
>
> It takes less than 5 seconds to recieve a 220 response.
>
> Any ideas where to look or do to see why this is so slow?

Do you have greet_pause enabled? If so, it's working as designed.

C.f.: http://www.acme.com/mail_filtering/sendmail_config.html

--

John (john@os2.dhs.org)

Re: Why is my sendmail connection so slow (telnet)?

On Sun, 21 Oct 2007 20:14:13 -0500, John Thompson
wrote:

>On 2007-10-21, B wrote:
>
>> I just installed sendmail 8.14.1 on Solaris 9. From the solaris host,
>> I telnet to itself:
>>
>> telnet localhost 25
>>
>> It takes atleast 15 seconds (sometimes longer) to recieve a 220
>> response.
>>
>> When I telnet to other mail servers:
>>
>> telnet outgoing.verizon.net 25
>>
>> It takes less than 5 seconds to recieve a 220 response.
>>
>> Any ideas where to look or do to see why this is so slow?
>
>Do you have greet_pause enabled? If so, it's working as designed.
>
>C.f.: http://www.acme.com/mail_filtering/sendmail_config.html


No, I do not have greet_pause feature enabled in my sendmail.mc file.

Could it be an issue with hosts, resolve, etc?

Re: Why is my sendmail connection so slow (telnet)?

In article <1lvnh3p2ulh9oeafa4m5teuaa1i8muob7u@4ax.com>,
B wrote:

> On Sun, 21 Oct 2007 20:14:13 -0500, John Thompson
> wrote:
>
> >On 2007-10-21, B wrote:
> >
> >> I just installed sendmail 8.14.1 on Solaris 9. From the solaris host,
> >> I telnet to itself:
> >>
> >> telnet localhost 25
> >>
> >> It takes atleast 15 seconds (sometimes longer) to recieve a 220
> >> response.
> >>
> >> When I telnet to other mail servers:
> >>
> >> telnet outgoing.verizon.net 25
> >>
> >> It takes less than 5 seconds to recieve a 220 response.
> >>
> >> Any ideas where to look or do to see why this is so slow?
> >
> >Do you have greet_pause enabled? If so, it's working as designed.
> >
> >C.f.: http://www.acme.com/mail_filtering/sendmail_config.html
>
>
> No, I do not have greet_pause feature enabled in my sendmail.mc file.
>
> Could it be an issue with hosts, resolve, etc?

It could be due to not having proper reverse name resolution for
127.0.0.1 to 'localhost' but that is a pretty rare sort of mistake. You
SHOULD have an entry in /etc/hosts like this:

127.0.0.1 localhost

and you should also have a line like this in /etc/nsswitch.conf:

hosts: files dns

One other reason Sendmail can take a long time to send a banner is is
the machine's load average is higher than Sendmail's DelayLA setting.

--
Now where did I hide that website...