email settings...
How do I change my email settings to IMAP for all my devices?
Depends on the eMail Provider...
For instance...
https://support.google.com/mail/answer/7104828?hl=en
You'll also need to change ports & Authentication possibly...
The receiving email ports are:
IMAP is port 143
IMAP-SSL is port 993
POP is port 110
POP-SSL is port 995
Outgoing ports are...
SMTP and SMTP-SSL is on ports 25, 587 and 465. Port 587 has to be SSL, and port 465 is enforced TLS-wrapped and is generally used by Outlook users.