You need to set up O2 manually as a POP3 account.
Incoming mail server (It's sometimes called the POP or POP3 server)
Enter 'mail.o2.co.uk'
Outgoing mail server (It's sometimes called the SMTP server)
Enter 'smtp.o2.co.uk'
Where you have an option for 'Use Authentication' on the outgoing server:
Enter:
User Name: your full O2 email address e.g yourname@o2.co.uk
Password: the password you use to login to the O2 website or when you check your O2 Webmail.
User Name (Sometimes called the account login)
Enter your full o2.co.uk email address.
Password
Enter the password for this email account. There will probably be an option to remember the password. If you don't choose this, you'll have to enter the password each time you check for new email.
Email address
Enter your full O2 email address.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.