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Email: meaning of Socket Error 10061


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My application needs to send and receive emails. Sometimes I get a socket error 10061 - what does this mean?


If you would get the error message all the times, then the explanation would be that either port 25 (needed for sending email using SMTP protocol) or port 110 (used to receive email using POP protocol) are blocked by a firewall or your router.

Since you report that this error happens on occasion (probably only when sending emails out), it can be assumed that the destination mail server is not accepting a connection from you. Maybe you've sent too many emails within an interval and the remote mail server considers your software to send out spam.
So you could

  • Reduce the frequency of sending mails to this server
  • Reduce the speed of sending mails to this server
  • Reduce the amount of mails to this server
  • Try again later
  • Send mails through a relay server

A few words about relay servers. There are 'open' relay servers that everyone can use. There is even a web site dedicated to keeping track of these open relay servers ( The problem with these open relay servers is that they are used by spammers and sending emails through them is a guaranteed way to get rejected. If you visit their site, make sure that your domain is not on their list yet.

If your domain is not brandmarked as an open relay and you are not sending high volumes in short time, then most likely the network problem is on the receiving end (the remote mail server).
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2007-01-18, 23:40:36   (updated: 2007-01-18, 23:42:08)
Moiz Syed from India  
Even i receive the same message! but when i restart my computer the problem seems to be vanish.
Any Guess what the problem could be?

Keywords: junk
2007-05-03, 17:17:49
anonymous from Reston, United States  
Moiz Syed, that is my EXACT problem. what i found, using Outlook 2003. when i first boot (or reboot) and login, all works well. If I logoff, and then immediately log back onto my system, using the same user name, I will receive the error. Then I will need to reboot to get it to function again. Just started happening to me within the last week, when changed their password security level. i'm betting they 'fixed' something that did not need fixing too.

2007-06-23, 12:13:07
anonymous from United States  
i get the same message when i try to play games on this computer. any idea what it means???
2007-10-29, 10:04:29
mister,k. from Netherlands  
hey, i am having the same problem with that error but at me the error starts at the begin i put my pc on. Does it means that i have a keylogger on my computer that tries to send e-mails?

i hope some of you knows it

mister k.
2007-12-22, 14:02:08
pey from United Kingdom  
i tryed updating spybot and got this error when i turned zone alarm on and tryed again it downloaded the updates
2008-05-28, 18:24:56
the resolution that has been given has been quite helpfull allthough some of the technical jargon is difficult to actually pass on to laymen. however it has been really helpfull.
2008-07-11, 05:48:59
anonymous from United Kingdom  
thanks very helpfull
2009-03-03, 20:04:53   (updated: 2009-03-03, 20:06:58)
anonymous from United States  
another thing to check is the active connections to/from your machine. (if your connections to ur computer/server work ok after restart only for a few minutes, then it sounds like some infected pc on ur network might be clogging up the connections to ur server...

2009-08-09, 09:00:29
anonymous from Las Vegas, United States  
Why won't my 1 & 1 .com email work?!?!?!?

just get an error :

The connection to the server has failed. Account: '', Server: '', Protocol: POP3, Port: 110, Secure(SSL): No, Socket Error: 10061, Error Number: 0x800CCC0E

send answer to or



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