Cable Forum - View Single Post - Can't send emails from ONE of the computers on the network(it's not a firewall issue)

Jawor · 09-10-2009, 07:59

Hello everyone,

Thanks for prompt responses!

after typing telnet smtp.mbhost.pl 25 (this is my main email provider, but the same happens with others) , i get :

220 mbhost.pl ESMTP Exim 4.69 Fri, 09 Oct 2009 08:48:25 +0200
HELO mbhost.pl <CR>
250 mbhost.pl Hello xx-xxx-xx-x.cable.ubr11.dals.blueyonder.co.uk [xx.xxx.xx.x]
MAIL FROM:jawor@xxxxxxxx.xx
500 unrecognized command

(where xxx is my private ip and domain - irrelevant here i hope)
I think I should type login and password here, shouldn't i ?

Anyway, when trying to send emails from Outlook (but also Thunderbird) I get

Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: 'pop.wp.pl', Server: 'smtp.wp.pl', Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F

this also happens when I disable my firewall (ESET Smart Security). I will try to clean it with anti-malware scanner later today, but I thought my antivirus should have done the job already.. maybe I am wrong.

I still have no idea why SMTP doesn't work.. maybe my MAC address is on some sort of 'black list' with those email providers? Maybe this spyware that I had was sending spam from my laptop? Is it possible?

09-10-2009, 07:59	#6
Jawor Inactive Join Date: Sep 2009 Location: London Age: 46 Services: broadband Posts: 6	Re: Can't send emails from ONE of the computers on the network(it's not a firewall is Hello everyone, Thanks for prompt responses! after typing telnet smtp.mbhost.pl 25 (this is my main email provider, but the same happens with others) , i get : 220 mbhost.pl ESMTP Exim 4.69 Fri, 09 Oct 2009 08:48:25 +0200 HELO mbhost.pl <CR> 250 mbhost.pl Hello xx-xxx-xx-x.cable.ubr11.dals.blueyonder.co.uk [xx.xxx.xx.x] MAIL FROM:jawor@xxxxxxxx.xx 500 unrecognized command (where xxx is my private ip and domain - irrelevant here i hope) I think I should type login and password here, shouldn't i ? Anyway, when trying to send emails from Outlook (but also Thunderbird) I get Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Account: 'pop.wp.pl', Server: 'smtp.wp.pl', Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F this also happens when I disable my firewall (ESET Smart Security). I will try to clean it with anti-malware scanner later today, but I thought my antivirus should have done the job already.. maybe I am wrong. I still have no idea why SMTP doesn't work.. maybe my MAC address is on some sort of 'black list' with those email providers? Maybe this spyware that I had was sending spam from my laptop? Is it possible?