Assume that you use Database Mail and sp_send_dbmail stored procedure to send an email in Microsoft SQL Server 2014, 2016 or 2017. When you pass the recipients parameter (for example: First Name, Last Name) that contains comma to the stored procedure, you may notice that the SQL Server fails to send an email. Additionally, you may receive an error message that resembles the following:
Msg 14613, Level 16, State 1, Procedure ProcedureName, Line LineNumber [Batch Start Line 0] The specified '@recipients' cannot use commas (,) to separate addresses: '"UserName, User Title" <Email@Contoso.com>'. To continue, use semicolons (;) to separate addresses.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.