2
Lots of Connection Failures Sending Mail Today
Question asked by Bob Bell - May 18, 2016 at 2:09 PM
Unanswered
All of a sudden today, after years of minimal problems, I am having trouble sending email from Smartermail. Below is a snapshot of the connection failures from the Delivery Logs. Also, all emails to GMAIL are bouncing with some IPv6 error. I don't even have IPv6 IPs bound to my server. Either it's a new rule set into play by Google today, or something else is whacked. Any idea what's going on all of a sudden?
 
FROM GMAIL
Failed Recipient: omitted@gmail.com
Reason: Remote host said: 550 5.7.1 [2002:3217:5292::3217:5292] Our system has detected that this message
5.7.1 does not meet IPv6 sending guidelines regarding PTR records and
5.7.1 authentication. Please review
5.7.1  https://support.google.com/mail/?p=ipv6_authentication_error for more
5.7.1 information. o124si13571387pfb.67 - gsmtp
 
FROM LOGS
13:52:51 [59109] System.Net.Sockets.SocketException (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 64.12.88.163:25
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
   at RelayServer.Clients.SMTP.ClientConnectionSync.Connect(Int32 connectionId)
13:52:51 [59109] Connection to 64.12.88.163 failed (Id: 17)

13:52:51 [59183] System.Net.Sockets.SocketException (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 152.163.0.100:25
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
   at RelayServer.Clients.SMTP.ClientConnectionSync.Connect(Int32 connectionId)
 
13:52:52 [59075] System.Net.Sockets.SocketException (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 98.138.112.37:25
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
   at RelayServer.Clients.SMTP.ClientConnectionSync.Connect(Int32 connectionId)
 
13:52:52 [59260] System.Net.Sockets.SocketException (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 152.163.0.68:25
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
   at RelayServer.Clients.SMTP.ClientConnectionSync.Connect(Int32 connectionId)
 
13:52:52 [59232] System.Net.Sockets.SocketException (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 64.12.91.195:25
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
   at RelayServer.Clients.SMTP.ClientConnectionSync.Connect(Int32 connectionId)
Web Engineer
http://www.fullblownwebdesign.com

Reply to Thread