Plain text format is not available for Symantec Endpoint Protection Manager (SEPM) email notifications
Article ID: 156496
Symantec Endpoint Protection (SEP) 12.1.x uses text/HTML format for notifications instead of plain text format. Some devices or programs are unable to view mail with text/html encoding.
Symantec Endpoint Protection Manager (SEPM) 12.1.1101.401 (12.1 RU1 MP1) and later supports sending email notifications in plain text format. The default format is text/HTML. To send notifications in plain text format, the SEPM administrator must edit the conf.properties file on the server (located in the SEPM installation folder, under \tomcat\etc\) and add the following new line: