Hi, Just found serious problem of TWSocket/TSmtpCli: infinite loop around DoRecv/DataAvailable in TWSocket !
It's happens only with some misconfigured/buggy MX servers. I found it while testing our smtp server based on ICS. If they try to deliver mail to domain nmact.org (MX server is nmact1.nmact.org) - ICS hangs immediately after TSmtpCli.Connect call to that MX, and TSmtCli.OnRequestDone never triggered. How to reproduce: 1.Run OverbyteIcsMailSnd demo. 2.Enter nmact1.nmact.org to "Smtp host" field. 3. Press Connect button. Demo app will stop responding immediately. ICS now in infinite loop between TCustomWSocket.DoRecv->TCustomWSocket.TriggerDataAvailable->TCustomSmtpClien t.WSocketDataAvailable Yes, nmact1.nmact.org is misconfigured (i check it using sniffer - they return 4096 bytes of zeroes (\0) as reply) but ICS should handle all situations anyway. --- With best regards, Max Terentiev. Business Software Products. AMS Development Team. supp...@bspdev.com -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
