Knowledgebase: E-mail
AppleMail Port 585 Problems
Posted by Dick DeVance on 12 December 2019 11:18 AM

When using Apple devices, you may experience issues where your IP address becomes blocked due to attempts to access port 585 on TotalChoice servers. This is because when Apple Mail is set to automatically detect settings, it periodically examines various ports on the server to see if they are open. On our network we utilize IMAP4 over SSL (IMAPS) which uses port 993, so attempts to access port 585 often leads to our firewall blocking access from your IP address.
To resolve this problem, you should switch to IMAPS or set your mail client to use port 993.