Email sync issue

[Swalo]

I have a new mac and mail set up fine from the start. However late last week I was checking around in my comcast.net account and say that all the emails I had deleted on the mac over the last few weeks were still in my inbox online.

Am I missing something here? Why do the two not synchronize?

Any suggestions would be great!

BR

Swalo

 

[GGJstudios]

Mail > Preferences > Accounts >Mailbox Behaviors > Trash > Store deleted messages on the server (uncheck this option)

 

[Swalo]

Thanks!