https://business.forums.bt.com/t5/Archive/Mysterious-delays-in-receiving-email/m-p/33215#M17916 <P>Our email setup was working fine until a few months ago.&nbsp; We then noticed that emails sent before about 10am were received straight away and after about 4pm.&nbsp; Between those times email often came in delayed but a failure message was received by the sender.&nbsp;</P><P>&nbsp;</P><P>Running the Exchange Remote Connectivity Analyzer returned: Testing TCP port 25 on host mail.<EM>ourdomain</EM>.co.uk to ensure it's listening and open. The specified port is either blocked, not listening, or not producing the expected response.</P><P>&nbsp;</P><P>This message coincided with the times - before 10am and after 4pm - all fine.</P><P>&nbsp;</P><P>Exchange is listening on port 25, port 25 is allowed in through the firewall.&nbsp; I can't see any services running here which coincide with those times and would jump in and steal port 25.</P><P>&nbsp;</P><P>Strangely, just before Christmas, the email was working fine all day.&nbsp; The Remote Connectivity Analyzer reported no problems.&nbsp; Now, today, we're back to port 25 problems again and no email during the day.</P><P>&nbsp;</P><P>&nbsp;</P> Tue, 03 Jan 2012 13:12:20 GMT baldrick69 2012-01-03T13:12:20Z https://business.forums.bt.com/t5/Archive/Mysterious-delays-in-receiving-email/m-p/33215#M17916 <P>Our email setup was working fine until a few months ago.&nbsp; We then noticed that emails sent before about 10am were received straight away and after about 4pm.&nbsp; Between those times email often came in delayed but a failure message was received by the sender.&nbsp;</P><P>&nbsp;</P><P>Running the Exchange Remote Connectivity Analyzer returned: Testing TCP port 25 on host mail.<EM>ourdomain</EM>.co.uk to ensure it's listening and open. The specified port is either blocked, not listening, or not producing the expected response.</P><P>&nbsp;</P><P>This message coincided with the times - before 10am and after 4pm - all fine.</P><P>&nbsp;</P><P>Exchange is listening on port 25, port 25 is allowed in through the firewall.&nbsp; I can't see any services running here which coincide with those times and would jump in and steal port 25.</P><P>&nbsp;</P><P>Strangely, just before Christmas, the email was working fine all day.&nbsp; The Remote Connectivity Analyzer reported no problems.&nbsp; Now, today, we're back to port 25 problems again and no email during the day.</P><P>&nbsp;</P><P>&nbsp;</P> Tue, 03 Jan 2012 13:12:20 GMT https://business.forums.bt.com/t5/Archive/Mysterious-delays-in-receiving-email/m-p/33215#M17916 baldrick69 2012-01-03T13:12:20Z https://business.forums.bt.com/t5/Archive/Mysterious-delays-in-receiving-email/m-p/39937#M17917 <P>Have you contacted BT regarding this matter? They can help you set it up correctly.</P> Wed, 23 May 2012 01:27:39 GMT https://business.forums.bt.com/t5/Archive/Mysterious-delays-in-receiving-email/m-p/39937#M17917 suntattood 2012-05-23T01:27:39Z