whats this error message

jabuda · 3 Jun 2004, 11:18 AM

Hi

What is this error message (1st time I have received it)

An unknown error has occurred. Account: '****@runbox.com', Server: 'smtp.runbox.com', Protocol: SMTP, Server Response: '421 fifi.runbox.com: Too many concurrent SMTP connections; please try again later.', Port: 25, Secure(SSL): No, Server Error: 421, Error Number: 0x800CCC67

BKB · 3 Jun 2004, 11:31 AM

Hm...
I have never seen this before either, but I guess it means, as it says, that:

There are too many concurrent SMTP connections; please try again later.

i.e. there are too many users accessing the SMTP server. You could try changing your Port to either 26 or 587. Do you know how to change this? It's in the accounts section of your email client.

BKB.

carverrn · 3 Jun 2004, 11:32 AM

Sounds like too many people trying to send email at the same time. The SMTP server can only handle so many connections at one time. The rest have to be refused. You'll just have to try again.

Regards,
Rich

trond · 3 Jun 2004, 06:21 PM

This is the work of spammers.

For the last couple of days, we've been getting about six times as much mail as normal. From about 10 SMTP-connections per second, to about 60. This seems to be somebody using a massive number of virus-infected computers to send out their spam.

They started about noon local time on Monday, and they're still going strong.
We have blocked about 1000 IPs in our firewall at the moment, and are considering alternatives to find a way to deal with this kind of traffic automatically.

In addition to creating problems to our SMTP server, our webserver became inaccsessible for about 90 minutes tonight, due to full disks. The mailserver logs every rejected mail, which has resulted in about 500MB/hour in logs. on each mailserver. (we're currently rejecting about 1200 mails per second, and the traffic is now less than half of what it was tonight).

carverrn · 3 Jun 2004, 09:04 PM

Thanks for the update Trond. I noticed the web problems last night and was wondering if it was related some how.

Rich

3 Jun 2004, 11:18 AM	#1
jabuda Member Join Date: Mar 2003 Location: Hobart, Tasmania, AUS Posts: 77	whats this error message Hi What is this error message (1st time I have received it) An unknown error has occurred. Account: '****@runbox.com', Server: 'smtp.runbox.com', Protocol: SMTP, Server Response: '421 fifi.runbox.com: Too many concurrent SMTP connections; please try again later.', Port: 25, Secure(SSL): No, Server Error: 421, Error Number: 0x800CCC67

3 Jun 2004, 11:31 AM	#2
BKB Cornerstone of the Community Join Date: Jun 2003 Location: New York, NY Posts: 900	Hm... I have never seen this before either, but I guess it means, as it says, that: There are too many concurrent SMTP connections; please try again later. i.e. there are too many users accessing the SMTP server. You could try changing your Port to either 26 or 587. Do you know how to change this? It's in the accounts section of your email client. BKB.

3 Jun 2004, 11:32 AM	#3
carverrn Intergalactic Postmaster Join Date: Jan 2002 Location: Chicago, IL Posts: 5,606 Representative of: Runbox.com	Sounds like too many people trying to send email at the same time. The SMTP server can only handle so many connections at one time. The rest have to be refused. You'll just have to try again. Regards, Rich

3 Jun 2004, 06:21 PM	#4
trond Essential Contributor Join Date: Oct 2003 Location: Oslo, Norway Posts: 344	This is the work of spammers. For the last couple of days, we've been getting about six times as much mail as normal. From about 10 SMTP-connections per second, to about 60. This seems to be somebody using a massive number of virus-infected computers to send out their spam. They started about noon local time on Monday, and they're still going strong. We have blocked about 1000 IPs in our firewall at the moment, and are considering alternatives to find a way to deal with this kind of traffic automatically. In addition to creating problems to our SMTP server, our webserver became inaccsessible for about 90 minutes tonight, due to full disks. The mailserver logs every rejected mail, which has resulted in about 500MB/hour in logs. on each mailserver. (we're currently rejecting about 1200 mails per second, and the traffic is now less than half of what it was tonight).

3 Jun 2004, 09:04 PM	#5
carverrn Intergalactic Postmaster Join Date: Jan 2002 Location: Chicago, IL Posts: 5,606 Representative of: Runbox.com	Thanks for the update Trond. I noticed the web problems last night and was wondering if it was related some how. Rich