Topic: Too many concurrent smtp connections

[Dazz]

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?

[CharlieBrady]

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.

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

[Dazz]

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

[Dazz]

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?

[CharlieBrady]

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?

[Dazz]

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.

[CharlieBrady]

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.

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?

[Dazz]

Hi There

The concurrencyremote is on 5

[CharlieBrady]

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.