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cannot retrieve emails from gmx.net
Problem reported by Stefan - April 21, 2016 at 11:00 AM
Submitted
Hi,
I have a rather strange problem with my smartermail installation. It's a small private installation with only 4 accounts. The system was running without problems for almost months. One of the accounts retrieves mails from 4 different mail providers (including gmx.net). Everything is fine with this account.
Another account retrieves mails from only 1 gmx.net account. Since a couple of days this retrieval is failing completely. In the popretrieval.log I can find a message saying:
 
19:40:55 [xxx@yyyyy.de] [pop.gmx.net:xxx@gmx.net] Exception: Von der Übertragungsverbindung können keine Daten gelesen werden: Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen.
   bei System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   bei System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)
   bei System.Net.Security._SslStream.StartFrameHeader(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
   bei System.Net.Security._SslStream.StartReading(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
   bei System.Net.Security._SslStream.ProcessRead(Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
   bei System.Net.Security.SslStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   bei RelayServer.Clients.POP.POP3Client.#2G(UInt32 #Eob)
19:40:55 Finished processing for xxx@yyyyy.de
 
Smartermail is running on Windows Server 2012R2 with all updates installed. I am running smartermail 15.0.5949.
Any Ideas are welcome.
 
Best regards,
Stefan

7 Replies

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0
Bruce Barnes Replied
April 22, 2016 at 3:53 AM
They may be blocking clients on port 25. Swithc to 587, which iw manditory per IETF: see .https://www.ietf.org/rfc/rfc2476.txt
Bruce Barnes
ChicagoNetTech Inc

Phone: (224) 444-0169

E-Mail and DNS Security Specialist
Network Security Specialist

Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/

Web and E-Mail Hosting, E-Mail Security and Consulting
0
Stefan Replied
April 24, 2016 at 8:22 AM
Doesn't anybody know details about the error message, please?
0
Paul Blank Replied
April 25, 2016 at 4:27 AM
Probably stating the obvious here, but have you tried retrieving those same emails with a desktop or mobile client at the same domain and port 995, just to make sure the "mechanism" is OK at that end?
 
 
1
Paul Blank Replied
April 25, 2016 at 5:10 AM
Google Translate gives me this:
 
"Exception: From the transmission connection, data can not be read: An existing connection was controlled by software canceled by the host computer."
 
Some kind of authentication/protocol change at the gmx.net end, perhaps? Not very helpful, I know.
0
Stefan Replied
May 11, 2016 at 1:29 PM
Update:
Problem is fixed with latest windows update...
 
0
Bruce Barnes Replied
May 11, 2016 at 3:45 PM
Stefan: Great catch on that fix. May I inquire as to the version of SmarterMail you are using? May I also ask what operating system you are running on the server. Thanks - Bruce
Bruce Barnes
ChicagoNetTech Inc

Phone: (224) 444-0169

E-Mail and DNS Security Specialist
Network Security Specialist

Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/

Web and E-Mail Hosting, E-Mail Security and Consulting
0
Bruce Barnes Replied
May 11, 2016 at 9:47 PM
Thanks!
Bruce Barnes
ChicagoNetTech Inc

Phone: (224) 444-0169

E-Mail and DNS Security Specialist
Network Security Specialist

Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/

Web and E-Mail Hosting, E-Mail Security and Consulting

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