@ziamehmood & @samK according to the Yahoo website these are the manual IMAP or POP settings to be entered via EMClient Account via the “Other” option as Olivia advised. Good luck 
IMAP server settings for Yahoo Mail
IMAP is the best way to connect your Yahoo Mail account to a desktop mail client or mobile app. It allows 2-way syncing, which means everything you do remotely is reflected in your Yahoo Mail account no matter where or how you access it. Here are the settings you’ll need to configure your mail client or app.
Incoming Mail (IMAP) Server
- Server - imap.mail.yahoo.com
- Port - 993
- Requires SSL - Yes
Outgoing Mail (SMTP) Server
- Server - smtp.mail.yahoo.com
- Port - 465 or 587
- Requires SSL - Yes
- Requires authentication - Yes
Your login info
- Email address - Your full email address ([email protected])
- Password - Your account’s password
- Requires authentication - Yes
POP server settings for Yahoo Mail
POP access settings and instructions for Yahoo Mail
POP (Post Office Protocol) is one way to get Yahoo Mail in a desktop or mobile app. POP downloads copies of your email, so you can move and delete them in the app without affecting the original emails.
POP settings for Yahoo Mail
Incoming Mail (POP) Server
- Server - pop.mail.yahoo.com
- Port - 995
- Requires SSL - Yes
Outgoing Mail (SMTP) Server
- Server - smtp.mail.yahoo.com
- Port - 465 or 587
- Requires SSL - Yes
- Requires TLS - Yes (if available)
- Requires authentication - Yes
Your login info
- Email address - Your full email address ([email protected].)
- Password - Your account’s password.
- Requires authentication - Yes