KB4476949 - FIX: Database Mail cannot send emails after you install CU1, CU2 or CU3 for SQL Server 2016 Service Pack 2

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Applies To

SQL Server 2016 Developer - duplicate (do not use) SQL Server 2016 Enterprise - duplicate (do not use) SQL Server 2016 Enterprise Core - duplicate (do not use) SQL Server 2016 Standard - duplicate (do not use)

Symptoms

When you install Cumulative Update 1(CU1), CU2 or CU3 for Microsoft SQL Server 2016 Service Pack 2, you will notice that the config file DatabaseMail.exe.config may be removed. Additionally, the Database Mail feature may not work correctly and cannot send email messages.

Resolution

This issue is fixed in the following cumulative update for SQL Server:

Cumulative Update 4 for SQL Server 2016 SP2

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:

Latest cumulative update for SQL Server 2016

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References

Learn about the terminologythat Microsoft uses to describe software updates.