It does sound like a misconfiguration in the UTM then. Please [Go Advanced] and attach pictures of the 'POP3 servers and prefetch settings' in 'Email Protection >> POP3' and of the 'POP3' tab when you're signed into the User Portal.
Cheers - Bob
Sophos UTM Community Moderator Sophos Certified Architect - UTM Sophos Certified Engineer - XG Gold Solution Partner since 2005
It does sound like a misconfiguration in the UTM then. Please [Go Advanced] and attach pictures of the 'POP3 servers and prefetch settings' in 'Email Protection >> POP3' and of the 'POP3' tab when you're signed into the User Portal.
Cheers - Bob
Sophos UTM Community Moderator Sophos Certified Architect - UTM Sophos Certified Engineer - XG Gold Solution Partner since 2005