Email on Mutt

This is only a basic example, but assuming support has been compiled in this should get you connected with IMAPS:

$ cat .muttrc
set realname="Email Test"
set from="email@testing.me.uk"
set use_from=yes
set edit_headers = yes
# Auto purge
set delete=yes
# Tidy header view
ignore *
unignore from date subject to cc
unignore organization organisation x-mailer: x-newsreader: x-mailing-list:
unignore posted-to:
# Server is sub-domain of aa.net.uk to play nice with SSL certs
# Automatically log in to this mailbox at startup
set spoolfile="imaps://email@testing.me.uk@testing.me.uk.mail.aa.net.uk/"
# Set INBOX ('=' folder) at startup
set folder="imaps://email@testing.me.uk@testing.me.uk.mail.aa.net.uk/"
set record="=Sent"
set postponed="=Drafts"
# always use SSL when connecting to the server
set ssl_force_tls=yes
# Automatically enter mailbox
unset imap_passive
# Poll subscribed mailboxes for new mail
set imap_check_subscribed
# Reduce polling frequency
set mail_check=60
# Poll the current mailbox more often
set timeout=10
# Cache of message headers
set header_cache=~/.hcache

Replacing 'imaps' with 'pop' will enable POP3. Of course you no longer need the IMAP specific options if you're using POP3:

# Automatically log in to this mailbox at startup
set spoolfile="pop://email@testing.me.uk@testing.me.uk.mail.aa.net.uk/"
# Set INBOX ('=' folder) at startup
set folder="pop://email@testing.me.uk@testing.me.uk.mail.aa.net.uk/"