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Old 10-11-2017, 03:24 AM   #1
bitfuzzy
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Slackware 14.1-64bit and Sendmail


Starting yesterday smtp and starttls connections are experiencing a delay

Running telnet localhost 25 I get
Connected to localhost.
Escape character is '^]'.

and about 40 seconds later
220 server.domain.com ESMTP Sendmail 8.14.9/8.14.9; Wed, 11 Oct 2017 04:19:46 -0400

It's been running fine, No changes have been made

Anybody have any ideas?
 
Old 10-11-2017, 04:15 AM   #2
business_kid
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I had some weird fault where 'route' was giving a 15 second delay. A complete network restart cleared it for me. Is your box continually up?
 
Old 10-11-2017, 04:26 AM   #3
GazL
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Delays like that are typically DNS or reverse DNS lookup related. That's where I'd start investigating.
 
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Old 10-11-2017, 04:36 AM   #4
bitfuzzy
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Quote:
Originally Posted by business_kid View Post
I had some weird fault where 'route' was giving a 15 second delay. A complete network restart cleared it for me. Is your box continually up?
Yea, thought of that, even reinstalled the last sendmail update just in case something got hosed

No dice
 
Old 10-11-2017, 04:40 AM   #5
bitfuzzy
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Quote:
Originally Posted by GazL View Post
Delays like that are typically DNS or reverse DNS lookup related. That's where I'd start investigating.
I've done that too :\ , though it shouldn't impact the local connection ie- telnet localhost 25, using 127.0.0.1 resulted in the same.
 
Old 10-11-2017, 04:56 AM   #6
bitfuzzy
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UPDATE

I found the issue, GazL, It was a DNS issue, only not the way one might think of.

As I indicated in my post, there had been no changes to the server which has been running fine for a very long time

"BUT" I can't say the same for the external milters that are in use. Sure enough, the site for one of the RBL milters I use
is down.

Once I disabled it and restarted Sendmail the problem was resolved.

Thanks for the help
 
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