SSL warning on Apple devices when connecting to mail server.

A mail client running on an Apple device will require you make an exception if the SSL certificate provided by the server doesn’t match the hostname you’re connecting through. If this SSL certificate is changed or renewed, which will happen at least once a year, another exception would need to be made.

By default, the mail server we would advise you to use would utilize your own domain name (e.g. mail.yourdomain.com). This will allow you to connect through a mail client, but if you attempt to connect with SSL enabled this will show a warning like: Certificate Mismatch. The recommended method of enabling secure connections would be to connect using the mail server’s actual hostname (e.g. mail123.extendcp.co.uk).

Most mail clients will allow you to either ignore the warning or provide an exception. Apple devices should let you do this the first time you connect, but when our SSL (*.extendcp.co.uk) renews, Apple devices will show another Certificate Mismatch error similar to when you set the mail account up, but won’t allow you to ignore the warning.

To fix the SSL issue with your Apple device, you will need to go into you email server settings in your Apple device, you can do this by following the list of instructions below. Once inside your email server settings, change the incoming and outgoing mail server from mail.[YOURDOMAINNAME].com, to mail[YOURSERVERNUMBER].extendcp.co.uk. You can find out what your server number is by contacting our customer services team, who will provide you with the number.

The username, password and all other details inside your email server settings need to stay the same, apart from any options relating to SSL. If you come across any option inside your email server settings relating to an SSL, untick the SSL. Changing the server name and the SSL tick are the only changes needed. If you need any assistance on where to go on your device to view these settings, use the list of instructions below.

  1. Settings
  2. Passwords & Accounts
  3. [Your Account]
  4. IMAP
  5. SMTP
  6. Primary Server
  7. Turn Off ‘Use SSL’
  8. Done
  9. Account
  10. Advanced Settings
  11. Turn Off ‘Use SSL’
  12. Account
  13. Done

This does however mean that your connection to the server will not be secured.

Or you can try to add another certificate exception manually via Keychain, but this isn’t something our teams would be able to provide support with.