Configure SMTP with custom port on SQL Server Reporting Services.

Usually setting up SMTP email configuration is a simple task where simply go to the SSRS configuration manager and give SMTP Server details, and you are done!

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However what if SMTP Server is running on a custom port other than port 25(Default), then we cannot configure it using the GUI.

Then all we need to find the rsreportserver.config file (Normally located in C:\Program Files\Microsoft SQL Server\MSRS11.MSSQLSERVER\Reporting Services\ReportServer) the SSRS and update SMTPServerPort tag in the config file.

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Then simply restart the reports server and you should be ready to go!

TL;DR

Custom SMTP port and other advance settings for email services on SQL Server Reporting Services can be configured using rsreportserver.config