Looking through forums and I cannot see this exact issue.
Today I was trying to setup email reports to show how my network is behaving for the past week on itels like Server CPU and memory. The report looks good but when I run the report on a task I get the following.
*** Assembly ExportToPdfCmd, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null, .NET version v4.0.30319 ***
2017-12-11 11:00:02,829  DEBUG ExportToPdfCmd.HTMLExporter - NavigationTimeoutMilliseconds 480000
2017-12-11 11:00:02,845  DEBUG ExportToPdfCmd.HTMLExporter - ConversionDelayMilliseconds 10000
2017-12-11 11:00:02,860  INFO ExportToPdfCmd.HTMLExporter - ExportToPdfCmd Exporting...
2017-12-11 11:00:08,496  ERROR ExportToPdfCmd.HTMLExporter - FAIL: A connection attempt was refused.
Anyone how where to start on this one? is is getting an error from the mail server when its running ExportToPdfCmd.HTMLExporter?