I have a Mercury site at home with this configuration from About dialog. Runs in Windows 7 Professional SP1 64 bits in Spanish.
Mercury/32 version: Mercury/32, v4.80.149, Aug 18 2015
Operating mode: Standalone
Windows version: 6.1
MERCURY.EXE directory: C:\MERCURY
Base directory: C:\MERCURY
New mailbox location: C:\MERCURY\MAIL\~N
TMP environment variable: C:\Temp\angel
TEMP environment variable: C:\Temp\angel
[No license installed]
All works fine but from time to time, the TCP/IP protocol is blocked outgoing. I can't browser any web page, all browsers fails: IExplorer, Firefox and Maxthon. But there are incoming connections: web server Apache, FTP server, etc. The solution is reboot computer.
I revised all programs use TCP/IP heavily and I found this in Mercury. The module MercuryD (POP3 client) polls mails each 5 minutes from several servers and accounts (telefonica, gmail, yahoo, etc). As you can see in the log session, first this Warning: SSL connection improperly closed by remote host. In the next poll, this error OpenSSL timed out during handshake. After that, the TCP/IP protocol blocks outgoing communications. Any ideas what it happens. Don't hesitate to request more info.
Thanks a lot. Angel.
01:12:26.798: --- 21 Jan 2017, 1:12:26.798 ---
01:12:26.801: Connect to 'pop.gmail.com', timeout 10 seconds.
01:12:27.953: SSL/TLS session established
01:12:27.953: ECDHE-RSA-AES256-GCM-SHA384, TLSv1.2, Kx=ECDH, Au=RSA, Enc=AESGCM(256), Mac=AEAD<lf>
01:12:27.954: Peer's certificate name is '/C=US/ST=California/L=Mountain View/O=Google Inc/CN=pop.gmail.com'.
01:12:27.954: >> +OK Gpop ready for requests from 88.XXXXXXXX f35mb135943214wrf<cr><lf>
01:12:27.954: << USER XXXXXXXXXXX<cr><lf>
01:12:27.985: >> +OK send PASS<cr><lf>
01:12:27.985: << PASS XXXXXXXXXXX<cr><lf>
01:12:29.233: >> +OK Welcome.<cr><lf>
01:12:29.234: << STAT<cr><lf>
01:12:29.438: >> +OK 0 0<cr><lf>
01:12:29.439: << QUIT<cr><lf>
01:12:29.595: >> +OK Farewell.<cr><lf>
01:12:29.598: Warning: SSL connection improperly closed by remote host.
01:12:29.599: --- Connection closed normally at 21 Jan 2017, 1:12:29.599. ---
01:17:46.538: --- 21 Jan 2017, 1:17:46.538 ---
01:17:46.541: Connect to 'pop.gmail.com', timeout 10 seconds.
01:17:57.556: OpenSSL timed out during handshake.