Hi Sebastian,

We've attempted to help troubleshoot their issues and I believe we have eliminated the mail server itself as a cause (we tested both on our relay, as well as with the clients own SMTP settings and it happened on both).

You say 'configuration' - do you have any suggestions at what else they may be able to look at?


- Nick Bradley
  Technical Support Lead
  Managed.com

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Nick Bradley
Support Technician
Managed.com/PowerDNN.com

I have a little more information that may be helpful. Our server support team turned on the SMTP logging after you mentioned it. When we had the 2 fails yesterday, they were able to pull some information.

The actual logs are below - it appears that the SmtpPooledStream # had been used in a prior transaction.



System.Net Information: 0 : [17280] HeaderCollection#23119920::Set(Content-Transfer-Encoding=base64)
System.Net Information: 0 : [17280] Associating MailMessage#1865026 with Message#46818285
System.Net Information: 0 : [17280] HeaderCollection#8917619::Set(Content-Transfer-Encoding=base64)
System.Net Information: 0 : [17280] HeaderCollection#8917619::Set(Content-Transfer-Encoding=base64)
System.Net Information: 0 : [17280] HeaderCollection#1662681::Set(Content-Transfer-Encoding=base64)
System.Net Information: 0 : [17280] HeaderCollection#1662681::Set(Content-Transfer-Encoding=base64)
System.Net Verbose: 0 : [17280] SmtpClient::.ctor()
System.Net Information: 0 : [17280] Associating SmtpClient#65161955 with SmtpTransport#557076
System.Net Verbose: 0 : [17280] Exiting SmtpClient::.ctor() -> SmtpClient#65161955
System.Net Verbose: 0 : [17280] SmtpClient#65161955::Send(MailMessage#1865026)
System.Net Information: 0 : [17280] SmtpClient#65161955::Send(DeliveryMethod=Network)
System.Net Information: 0 : [17280] Associating SmtpClient#65161955 with MailMessage#1865026
System.Net Information: 0 : [17280] Associating SmtpTransport#557076 with SmtpConnection#37810
System.Net Information: 0 : [17280] Associating SmtpConnection#37810 with ServicePoint#45739363
System.Net Verbose: 0 : [17280] SmtpPooledStream::Dispose #58830239
System.Net.Sockets Verbose: 0 : [17280] Socket#55345640::Send()
System.Net.Sockets Error: 0 : [17280] Socket#55345640::UpdateStatusAfterSocketError() - ConnectionReset
System.Net.Sockets Error: 0 : [17280] Exception in Socket#55345640::Send - An existing connection was forcibly closed by the remote host.
System.Net.Sockets Verbose: 0 : [17280] Exiting Socket#55345640::Send() -> Int32#0
System.Net Error: 0 : [17280] Exception in SmtpClient#65161955::Send - Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host..
at System.Net.Sockets.NetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.Mail.SmtpPooledStream.Dispose(Boolean disposing)
at System.IO.Stream.Close()
at System.IO.Stream.Dispose()
at System.Net.ConnectionPool.Destroy(PooledStream pooledStream)
at System.Net.ConnectionPool.PutConnection(PooledStream pooledStream, Object owningObject, Int32 creationTimeout, Boolean canReuse)
at System.Net.Mail.SmtpConnection.GetConnection(ServicePoint servicePoint)
at System.Net.Mail.SmtpTransport.GetConnection(ServicePoint servicePoint)
at System.Net.Mail.SmtpClient.GetConnection()
at System.Net.Mail.SmtpClient.Send(MailMessage message)
System.Net Verbose: 0 : [17280] Exiting SmtpClient#65161955::Send()
System.Net Verbose: 0 : [17280] ConnectionPool::ForceCleanup
System.Net Verbose: 0 : [17280] Exiting ConnectionPool::ForceCleanup

Would it be helpful if you could look at the entire log? If so, can I send it to you via email?