Sohu is also an aboriginal news portal since the beginning of Chinese Internet era, so its mail service has got a large number of users. See Sohu imap pop3 and smtp settings bellow.

Incoming Settings

The IMAP server is imap3.sohu.com and it is using the port 143.

The POP server is pop3.sohu.com and it is using the port 110. 

Outgoing Settings

The outgoing SMTP server is smtp.sohu.com and it is using the port 25. 

Your email address is your username.

source: SOHU