Here , you will get Support if Yahoo Not Sending or receiving email from your iphone / android device then let's be process solution is here don't need to wait dial here - 1 866 235 4333 to know your issues as soon as possible .
1) Rebooting iPhone 6 and re-enter Account and Password. 2) If re-entering Yahoo account doesn’t work. Select iPhone Settings -> Mail, Contacts, Calendars and DELETE the affect Yahoo Mail account 3) Re-enter your yahoo account with the correct setting. Below is an example of a correct setting for Yahoo Mail. If you’re unsure what to input. Check here: Apple Email Setup Lookup Incoming Mail Server Account Type:IMAP Username: Putyouraccount@yahoo.com Server hostname: imap.mail.yahoo.com Server port:993 Authentication:Password SSL/TLS:Yes Outgoing Mail Server Username: your full email address Server hostname:smtp.mail.yahoo.com Server port:465 Authentication:Password SSL/TLS:Yes If the above step didn’t fix your problem, try going on your PC and change the password to the Yahoo account. Goto iPhone 6 Setting -> Mail, Contacts, Calenders -> Select Fetch New Data and Turn off “Push” Change Push to Chose To 15 Mintues. If the above instructions doesn’t fix the yahoo mail can’t send email on iphone, you might want to check this more in dept troubleshooting Email Guide .