Are you sure no exception / stacktrace? Could it be serialization problem? Due to the way MailMessage
was implemented my Microsoft, it cannot be serialized.
If you are using SQL Server, check column [InvocationData]
in [HangFire].[Job]
table and see if anything gets serialized at all.
Refer to my answer here hope it helps: Help Sending Email (MailMessage Deserialize Problem)