PROBLEM
Reports are not sent out when emailing 20 reports at once. SMTP service seems to time out.
CAUSE
Likely cause is the SMTP service fails to close properly, and eventually times out.
WORKAROUND
Send a few reports at a time instead of several more at once.
RESOLUTION
Apply this hotfix from link below, in which we Set the MaxIdleTime value to 1 in the Reporting Service config file. This may help to alleviate the SMTP connection issues.
This hotfix must be installed on your Enterprise Server and you must be running version 5.5 SP1
Download the hotfix to your server from here:
KB23692Double click the .exe file and follow instructions