iOS Mail unable to send/receive

Question

When connected through UTM 9, my iOS devices are not able to send or receive mail with multiple providers (EG: Yahoo, Gmail and 50webs hosting). 
 When on LTE network, everything works as expected. 
 What do I need to do to fix this problem? 
 Thanks in advance! 
 Dale

David Birdsall · Answer

dale sellers said: 
 
 When connected through UTM 9, my iOS devices are not able to send or receive mail with multiple providers (EG: Yahoo, Gmail and 50webs hosting). 
 When on LTE network, everything works as expected. 
 What do I need to do to fix this problem? 
 Thanks in advance! 
 Dale

Dale, 
 Do you have IMAPS, POP3S, or SMTPS scanning turned on? i.e.: Are you scanning the secure versions of IMAP, POP3, or SMTP? 
 This causes issues with my iOS devices when turned on in XG Firewall (because I haven't worked on the certificates yet). 
 *I switched to XG months ago and can't remember the UTM console to direct you where to look.* 
 You can continue to scan standard IMAP, POP3, and SMTP, but turning off scanning for IMAPS, POP3S, and SMTPS may help you with this issue.

JoeStern · Answer

A follow-up: we were limiting traffic on the guest wireless network to ports 80 and 443. 
 When we changed the rule to Any, iOS mail started working properly.