Unable to connect with Yahoo SMTP server
The problem suddenly popped up today: I wanted to send a message and suddenly got notification that Mail app is unable to send the message using Yahoo server, which I noticed being listed as offline. I clicked on "check connection" and it showed Gmail IMAP and IMAP as well as Yahoo IMAP being connected while Yahoo SMTP not. On the right side of Yahoo SMTP Red "dot" there was the instruction, which recommended to check settings of the network connection as well as to make sure if the server supports SSL, and if "NO" - deselect it. I'm not as tech savvy so the marked part is just the Chinese language for me: what is SSL, how to check if the server supports it etc? What exactly should I do to fix the issue? any coherent help would be welcomed greatly!
Thank you
scrutinizer
MacBook Pro, OS X Mavericks (10.9.3)