We have a job that sends 14 emails to an internal email address and on October 28 we were seeing timeout messages with the email.
10/28/2014 8:45:30 AM	Err	Exception in Task: Connection timeout (error code is 73730)
This only started happening and it ran fine yesterday and today however we are trying to get more information on what this means.  I did find this post 
http://www.visualcron.co...sts&t=2855#post13857  so I checked our settings and we currently use the IP address for the connection so DNS shouldn't be an issue.
I turned on extended debugging and created a test job that sends an email and noticed a significantly long delay between 2 messages.
10/30/2014 10:05:14 AM  Info  Job started: paw test email
10/30/2014 10:05:14 AM  Debug Job (3837) was added to processlist: paw test email
10/30/2014 10:05:14 AM  Info  Skipping Condition check because the Job was run manually.
10/30/2014 10:05:14 AM  Debug Next action: ActionContinue
10/30/2014 10:05:14 AM  Debug Calling GetNextTaskProcess()
10/30/2014 10:05:14 AM  Debug Next Task is: email
10/30/2014 10:05:14 AM  Debug Next action: ActionContinue
10/30/2014 10:05:14 AM  Debug Calling StartTaskProcess() with Task: email (0)
10/30/2014 10:05:14 AM  Debug Task (8334) was added to processlist: email
10/30/2014 10:05:14 AM  Info  User 'admin' - Ran Job: paw test email
10/30/2014 10:05:14 AM  Info  Task started: email (8334)
10/30/2014 10:05:14 AM  Debug Entering wait loop. email (8334)10/30/2014 10:05:31 AM  Info  Task completed: email (8334)10/30/2014 10:05:31 AM  Debug Process status - About to RemoveTaskProcess (8334)
10/30/2014 10:05:31 AM  Debug Setting previous task in TaskProcessCompleted: email ([REMOVED]) in job: paw test email
10/30/2014 10:05:31 AM  Debug Process status - About to SendTaskProcess (8334)
10/30/2014 10:05:31 AM  Debug Process status - About to RemoveTaskProcess (8334)
10/30/2014 10:05:31 AM  Debug Task (8334) was removed from processlist: email
10/30/2014 10:05:31 AM  Debug Sleep ended because Task ended.email (8334)
10/30/2014 10:05:31 AM  Debug TaskWaitQueue.Dequeued.email (8334)
10/30/2014 10:05:31 AM  Debug Else (1)email (8334)
10/30/2014 10:05:31 AM  Debug End of loop - iterating again.email (8334)
10/30/2014 10:05:31 AM  Debug Calling GetNextTaskProcess()
10/30/2014 10:05:31 AM  Debug Job (3837) was removed from processlist: paw test email
10/30/2014 10:05:31 AM  Debug Next execution (2) for job 'paw test email' is: 12:00:00 AM
10/30/2014 10:05:31 AM  Info  Job completed: paw test email
What is the 'Entering wait loop. email' message in the log?  It seems like it takes a long time to send the SMTP message to the server.  It is almost as if the job waits for a response before continuing.  We are using version 6.1.7 and will probably be upgrading to 7.x sometime next year.
Thanks,
Peter