Connection Timeout (General questions)

by ajitpals, Thursday, April 14, 2016, 13:18 (3145 days ago) @ Jasmine

I have check the SMTP Log file from the Client. The log show the connection and error from Client Side:

,Received certificate
2016-04-14T10:31:00.630Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,19,192.168.0.214:38886,168.62.204.113:25,*,234523452345234523452435245,Certificate thumbprint
2016-04-14T10:31:00.630Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,20,192.168.0.214:38886,168.62.204.113:25,>,EHLO Client,
2016-04-14T10:31:00.661Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,21,192.168.0.214:38886,168.62.204.113:25,<,"250-Server Hello abc.com [IPAddress], nice to meet you",
2016-04-14T10:31:00.661Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,22,192.168.0.214:38886,168.62.204.113:25,<,250-EXPN,
2016-04-14T10:31:00.661Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,23,192.168.0.214:38886,168.62.204.113:25,<,250-STARTTLS,
2016-04-14T10:31:00.661Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,24,192.168.0.214:38886,168.62.204.113:25,<,250-HELP,
2016-04-14T10:31:00.661Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,25,192.168.0.214:38886,168.62.204.113:25,<,250-PIPELINING,
2016-04-14T10:31:00.661Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,26,192.168.0.214:38886,168.62.204.113:25,<,250 8BITMIME,
2016-04-14T10:31:00.661Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,27,192.168.0.214:38886,168.62.204.113:25,*,75962,sending message
2016-04-14T10:31:00.661Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,28,192.168.0.214:38886,168.62.204.113:25,>,MAIL FROM:<email address sender>,
2016-04-14T10:31:00.661Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,29,192.168.0.214:38886,168.62.204.113:25,>,RCPT TO:<Email Address TO>,
2016-04-14T10:31:12.939Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,30,192.168.0.214:38886,168.62.204.113:25,<,250 <email address sender>... sender ok,
2016-04-14T10:31:13.157Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,31,192.168.0.214:38886,168.62.204.113:25,<,250 <email address TO>... recipient ok,
2016-04-14T10:31:13.157Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,32,192.168.0.214:38886,168.62.204.113:25,>,DATA,
2016-04-14T10:38:21.916Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2E,0,,54.152.144.243:25,*,,attempting to connect
2016-04-14T10:38:42.929Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2E,1,,54.152.144.243:25,*,,"Failed to connect. Error Code: 10060, Error Message: 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 IP:25"
2016-04-14T10:38:42.929Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2E,0,,52.200.243.123:25,*,,attempting to connect
2016-04-14T10:39:03.943Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2E,1,,52.200.243.123:25,*,,"Failed to connect. Error Code: 10060, Error Message: 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 IP:25"
2016-04-14T10:41:14.112Z,Windows SBS Internet Send NMXSBS,08D356C0C9950E2D,33,192.168.0.214:38886,168.62.204.113:25,-,,Remote

Log From SMTP Server Component.
1: Client IP address got connected on the component.
Transcript saved from the Log.

EHLO Client
250-eServerSide Hello Client [IPAddress], nice to meet you
250-EXPN
250-STARTTLS
250-HELP
250-PIPELINING
250 8BITMIME
STARTTLS
220 Go ahead, negotiate
EHLO Client
250-Server Hello Client [IPAddress], nice to meet you
250-EXPN
250-STARTTLS
250-HELP
250-PIPELINING
250 8BITMIME
MAIL FROM:<Sender>
250 <Sender>... sender ok
RCPT TO:<Receiver>
250 <Receiver>... sender ok

Server is waiting for mail start command .ie DATA but didn't receive.
2: Stoped the SMTP server component and Now Client IP address is disconnected.

Event the client remain connected through out the session but SMTPSERVER don't receive the DATA command after RCPT TO command and Client server failed with message Serer didn't respond.

We have one uptime connector service, it check whether the SMTP server is running or not. It keeps connecting and disconnecting from server very often.

It happening most of the time.

Thanks.