Because the author has 993 open to his server, the iPhone is making an IMAP connection when selecting the "other" type account. iPhones will try this type of connection first when using the "other" account type.
Jun 05, 2019 8 Ways On How to fix iPhone Mail Connection To Server Failed Aug 27, 2019 iPhone Can't Get Mail, the Connection to the Server Failed iPhone Can’t Get Mail, the Connection to the Server Failed?The Fix 1 Re-enter the Password. Sometimes this problem can occur when you change your email password on another device. It is 2 Delete Your Email Account and Re-add It. Deleting the problematic email account and then re-adding it may fix How to Fix "An Error Connecting to the Apple ID Server
Apr 21, 2020
iPhone 6 "Cannot Get Mail - The connection to the server failed" alert I've had this issue come up before but it usually went away after I restart my iPhone. Now I've been trying to … Yahoo Cannot Get Mail. The connection to … - Apple Community Sep 08, 2014
Sep 17, 2017
Oct 13, 2018 "Cannot get mail/The connection to the server has failed Feb 21, 2013 How to Set the Outgoing Mail Server on an iPhone: 9 Steps Feb 26, 2018 Fix Cannot Get Mail - The Connection to the Server Failed Sep 29, 2016