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Legacy Forums => General Discussion (Legacy) => Topic started by: Dazz on February 14, 2006, 03:25:04 PM

Title: Too many concurrent smtp connections
Post by: Dazz on February 14, 2006, 03:25:04 PM

Hi

I'm running SME Server 6.0.1 and am having a problem with qmail and ezmlm. I have 100+ members on my mailing list and I've recently had a problem with too many concurrent smtp connections to my ISP's mail relay. I contacted them and they advised me to reduce it to at leat 5. I've tried "googling" for some help on how to do this but still can't find anything. Can anyone out there help?

Title: Re: Too many concurrent smtp connections
Post by: CharlieBrady on February 14, 2006, 03:57:06 PM

Quote from: "Dazz"

I'm running SME Server 6.0.1 and am having a problem with qmail and ezmlm. I have 100+ members on my mailing list and I've recently had a problem with too many concurrent smtp connections to my ISP's mail relay.

If they just block the excessive connections there's nothing for you to do. Your system will handle that.

Quote

I contacted them and they advised me to reduce it to at leat 5.

I think you mean "at most 5".

/sbin/e-smith/config setprop qmail ConcurrencyRemote 5
/sbin/e-smith/signal-event post-upgrade
/sbin/e-smith/signal-event reboot

Title: Too many concurrent smtp connections
Post by: Dazz on February 16, 2006, 08:12:43 AM

Thanks, I'll try this out and check if all is well.

Title: Too many concurrent smtp connections
Post by: Dazz on February 16, 2006, 01:20:34 PM

Hi There

I tried the configuration but I still get the same error when I send an email to my ezmlm mailing list. Anyone have any ideas?

Title: Too many concurrent smtp connections
Post by: CharlieBrady on February 16, 2006, 02:51:44 PM

Quote from: "Dazz"

I tried the configuration but I still get the same error when I send an email to my ezmlm mailing list.

What error do you get?

Title: Too many concurrent smtp connections
Post by: Dazz on February 17, 2006, 07:43:24 AM

Remote host said: 421 Too many concurrent SMTP connections from this IP address - The real problem here, is that people are complaining that sometimes they receive mail sent to the list and many other times they don't.

Title: Too many concurrent smtp connections
Post by: CharlieBrady on February 17, 2006, 02:21:51 PM

Quote from: "Dazz"

Remote host said: 421 Too many concurrent SMTP connections from this IP address -

That'll just cause the message to be held for later redelivery.

Quote

The real problem here, is that people are complaining that sometimes they receive mail sent to the list and many other times they don't.

Do they provide proof? Or are they just a little impatient?

If you have applied the change I suggested and still see that message, then you have either mistyped, or 5 is still too high. What does:

cat /var/qmail/control/concurrencyremote

show?

Title: Too many concurrent smtp connections
Post by: Dazz on February 17, 2006, 03:01:23 PM

Hi There

The concurrencyremote is on 5

Title: Too many concurrent smtp connections
Post by: CharlieBrady on February 17, 2006, 03:48:23 PM

Quote from: "Dazz"

The concurrencyremote is on 5

If that is too many, then, well, it's too many. But as I said, this shouldn't be critical - qmail will just retry later.