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![Notification: Sophos Email Appliance - Emails being rejected as server configuration errors after upgrading the SEA to the 4.5.3.4 version]](https://community.sophos.com/cfs-filesystemfile/__key/communityserver-components-secureimagefileviewer/communityserver-blogs-components-weblogfiles-00-00-00-00-19/16.png_2D00_512x256x2.png?_=637886327903302957)
