oiku_email_headers – filter Hook name: oiku_email_headersHook type: filterPlugin ref: Sourcefile: File ref: Description: Parameters: Deprecated?: NoAPI Letters: Invokers1 to 1 of 1oiku_get_email_headers() – Set the email headers for the wp_mail() callImplementers1 to 2 of 2Post: 22885oiku_replace_fields() – Perform symbolic substitution of the fields in the bodyPublished: December 7, 2016 | Last updated: December 7, 2016