Hi Hoping someone can assist with this. I've tried three times to register a new team at http://cgi.softwarefreedomday.org/register.html but get the following message: ========= We've encountered a problem while trying to send email. Please use the back button on your browser to return to the registration page and try again. The error was: Connection error from localhost on port 25 (421 Too many concurrent SMTP connections; please try again later.) ========= -- Regards Steven Steven Vincent Director TechnologyWise Ltd email: steven@tw.co.nz twitter: stevenmvincent www.technologywise.co.nz PO Box 2228, Tauranga, NZ ph: +64 (0)7 571 1060 | fax: +64 (0)7 571 1061 | mob: 021 831 853
As suggested "please try again later" which I have and it worked. Thank you. On 30/07/10 20:52, Steven Vincent - TechnologyWise wrote:
Hi
Hoping someone can assist with this. I've tried three times to register a new team at http://cgi.softwarefreedomday.org/register.html but get the following message:
========= We've encountered a problem while trying to send email. Please use the back button on your browser to return to the registration page and try again. The error was
Connection error from localhost on port 25 (421 Too many concurrent SMTP connections; please try again later.)
=========
Dear Steven I am not very much experienced but regarding your question i have a solution The problem is arised due distributed denial-of-service attack. 421 Too many concurrent SMTP connections. The mails are send over the servers through port #25 I would like to request SFI server administrator to modify the exim.conf file. Move the port of 25 to port 889 or some other free port. daemon_smtp_ports = 25 : 889 It means it will listen on both ports. Other code further down in the file limits that port to be used only by authenticated senders. But this could be a temporary solutions. Of course if we move exim off port 25 completely we'll solve the problem, but it would be easier to just unplug the server; the effect would be roughly the same . If you block port 25, then no one can send email to the server. The best solution i would like to suggest SFI to hire a email server to handle SMTP connections only and heavily filter email coming in before relaying it to the real mailserver. OR Check out the IP Adress that is trying for a automated and repeated connection to SFD web. Cheers, Manmohan Brahma India
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Manmohan Brahma -
Steven Vincent - TechnologyWise