The problem in short:
1. I cannot send mails. I get "Message not sent. Server replied: Connection refused 111 Can't open SMTP stream." in squirrel...
2. I cannot receive mails. (I can connect using imap and squirrel, but the e-mails are not routed, so no new emails)...
I've spent 12 hours today, trying to fix this but without success...
This morning:
Everything was working fine, except: thousands and thousand of spam mails were sent using my email server... So I thought that updating exim and dovecot and applying smtp auth would help...
What I did:
1. I installed dovecot and exim using apt-get, and run build as in https://help.ubuntu.com/community/Dovecot and https://help.ubuntu.com/community/Exim4
2. I tried to configure SMTP Authentication according to https://help.ubuntu.com/8.04/serverguide/C/exim4.html
Now I cannot receive new mails, but I can read the old ones using imap or squirrel. I cannot send any mails...
I have tried:
http://help.directadmin.com/item.php?id=16
http://help.directadmin.com/item.php?id=51
http://www.directadmin.com/forum/showthread.php?t=21311
http://ubuntuforums.org/showthread.php?t=736419
and setting exim up using sudo dpkg-reconfigure exim4-config...
Now I'm lost. No mails out, no mails in. I don't know what to do...

Thanks for any help!
//Mike
1. I cannot send mails. I get "Message not sent. Server replied: Connection refused 111 Can't open SMTP stream." in squirrel...
2. I cannot receive mails. (I can connect using imap and squirrel, but the e-mails are not routed, so no new emails)...
I've spent 12 hours today, trying to fix this but without success...

This morning:
Everything was working fine, except: thousands and thousand of spam mails were sent using my email server... So I thought that updating exim and dovecot and applying smtp auth would help...
What I did:
1. I installed dovecot and exim using apt-get, and run build as in https://help.ubuntu.com/community/Dovecot and https://help.ubuntu.com/community/Exim4
2. I tried to configure SMTP Authentication according to https://help.ubuntu.com/8.04/serverguide/C/exim4.html
Now I cannot receive new mails, but I can read the old ones using imap or squirrel. I cannot send any mails...
I have tried:
http://help.directadmin.com/item.php?id=16
http://help.directadmin.com/item.php?id=51
http://www.directadmin.com/forum/showthread.php?t=21311
http://ubuntuforums.org/showthread.php?t=736419
and setting exim up using sudo dpkg-reconfigure exim4-config...
Now I'm lost. No mails out, no mails in. I don't know what to do...

Thanks for any help!
//Mike