![connection to external mail server being blocked - General Discussion - UTM Firewall - Sophos Community connection to external mail server being blocked - General Discussion - UTM Firewall - Sophos Community](https://community.sophos.com/cfs-file/__key/communityserver-discussions-components-files/51/pastedimage1503367194040v1.png)
connection to external mail server being blocked - General Discussion - UTM Firewall - Sophos Community
![Advanced Office 365 Routing: Locking Down Exchange On-Premises when MX points to Office 365 - Microsoft Tech Community Advanced Office 365 Routing: Locking Down Exchange On-Premises when MX points to Office 365 - Microsoft Tech Community](https://techcommunity.microsoft.com/legacyfs/online/media/2019/02/hybmailflow1_thumb.jpg)
Advanced Office 365 Routing: Locking Down Exchange On-Premises when MX points to Office 365 - Microsoft Tech Community
![Email Continuity for Internal Mail Server with External Filtering - Technical Solutions - Email Continuity Email Continuity for Internal Mail Server with External Filtering - Technical Solutions - Email Continuity](https://message-continuity.com/images/stories/EC_internal_mail_server_external_filtering_uptime_notitle.jpg?modal=1)
Email Continuity for Internal Mail Server with External Filtering - Technical Solutions - Email Continuity
![External mail server (gmail) configured for notifications - not working - Discussions - Sophos (XG) Firewall - Sophos Community External mail server (gmail) configured for notifications - not working - Discussions - Sophos (XG) Firewall - Sophos Community](https://community.sophos.com/resized-image/__size/2080x1170/__key/communityserver-discussions-components-files/126/5582.settings.jpg)