In jobs under email extension plugin advanced settings, triggers.  I have success and failure-any email triggers set for recipients, developers and culprits.  The plugin appears to not send emails to these individuals, even though their email address and user names are in the commit history.  The email plugin appears to ignore the advanced trigger settings for sending emails.  We never had any issue in the past until we upgraded to email ext plugin 2.75.  However, major changes have happened in git plugin and git client plugin as well which may have broke functionality.