Can not send mail

Can not send mail

Hi,
I am using Windows XP SP3 & Outlook 2007
Connection is IMAP
My last email was send Wed 2/22/2017 09:40 GMT via this Computer
I still receiving emails without any problem BUT I can not send.
After this email I can not send any additional email via the specific Computer

I am receiving the below Error:

 

Your server does not support the connection encryption type you have specified. Try changing the encryption method. Contact your mail server administrator or Internet service provider (ISP) for additional assistance.


NOTE: I can send and receive emails via my mobile

I tried all possible solutions. I change SSL to TLS, ports, unistall and install OUTLOOK 2007 etc etc . NO RESULT

Can you please assist me?