Mail server doesn't support secure authentication

[kreya]

Hi,
when iam trying to receive emails using Thunderbird email client i get this error

Mail server doesn't support secure authentication

contents of mail.log
Jun 15 12:26:48 server1 courierpop3login: Connection, ip=[::ffff:192.168.1.254]
Jun 15 12:27:09 server1 courierpop3login: Disconnected, ip=[::ffff:192.168.1.254]

sending emails using SMTP-TLS port 25 is working fine.
I am able to send and recive mails using outlook express

How can i fix this?

[till]

Is courier pop3s started and have you opened the port for pop3s in the firewall?

[kreya]

How do I check if courier POP3s is running?

I am able to receive mails in Outlooks Express using POP3s on port 995. it's working fine.
but I am not able to receive emails both on port 110 and 995 when I use ThunderBird

[till]

If you are able to receive mails with outlook express, then it is not a server problem.

[kreya]

I removed secure authentication option and now I am able to receive mails in thunderbird on POPs port 995.

thanks a lot for helping me out.