Sending E-mails in SSRS over Ports other than 25

Eitan Blumin fixes an error:

After configuring an Email subscription, the subscription result shows: “Failure sending mail: One or more errors occurred.“. In this blog post I will share how I investigated and resolved one such failure.

My first step in troubleshooting this error was to query from the ExecutionLog3 view inside the ReportServer database. I normally do this to check if and why a report subscription has failed its run.

However, in this case all the log records showed success (rsSuccess status):

Read on to see what this indicates, how Eitan was able to troubleshoot the problem, and the ultimate fix.