https://community.sophos.com/sophos-xg-firewall/f/discussions/79847/ip-public-is-a-black-list-to-hotmailHi I had a problem with my firewall public IP as it appears as blacklisted in the domain of Hotmail, so that you can not receive emails from Hotmail domain, I could help with this problem.en-USTelligent Community 12https://community.sophos.com/thread/304868?ContentTypeID=1Mon, 05 Sep 2016 03:52:07 GMT4be5eb7d-caa4-4ff5-8e60-8f9463545a35:b370b46e-2581-4012-a431-b0154a400e2eBonMerd<p>Maybe the forged HELO is responsible ?&nbsp;<a href="https://community.sophos.com/products/xg-firewall/f/130/t/77473">community.sophos.com/.../77473</a></p><div style="clear:both;"></div>https://community.sophos.com/thread/304458?ContentTypeID=1Mon, 29 Aug 2016 15:13:09 GMT4be5eb7d-caa4-4ff5-8e60-8f9463545a35:6db1ed23-d147-46a8-9f57-eaf4e1c71c8clferrara<p>It can depends on a number of factors. </p> <p>Make sure that your XG is configured correctly and all your inside devices are well protected.</p> <p>Thanks </p><div style="clear:both;"></div>https://community.sophos.com/thread/304453?ContentTypeID=1Mon, 29 Aug 2016 14:56:49 GMT4be5eb7d-caa4-4ff5-8e60-8f9463545a35:547b347d-9b4b-4033-a3f7-2da923fa8f4bWilsonBarba<p>Thank you very much for your help lferrara, but this problem did not exist until the XG appliance was placed in production</p><div style="clear:both;"></div>https://community.sophos.com/thread/304445?ContentTypeID=1Mon, 29 Aug 2016 14:41:32 GMT4be5eb7d-caa4-4ff5-8e60-8f9463545a35:4a0973f8-9262-40e6-b688-c000a7500105lferrara<p>Wilson,</p> <p>this is an issue not related to UTM/XG but it is a problem inside your network or your mail server is improperly configured. </p> <p>If you need help, send me a PM.</p> <p>Thanks</p><div style="clear:both;"></div>