lib/mail_spy/manager.rb in mail_spy-0.0.8 vs lib/mail_spy/manager.rb in mail_spy-0.0.9

@@ -56,10 +56,10 @@
       email = MailSpy::Email.create!(options)
 
       #Enable sendgrid specific enhancements
       if esp.options[:enable_sendgrid_event_tracking].present?
         header = MailSpy::Sendgrid::SmtpApiHeader.new
-        header.setUniqueArgs({:eid => email.id})
+        header.setUniqueArgs({:eid => email.id.to_s})
         email.headers = {'X-SMTPAPI' => header.asJSON}.merge(email.headers)
       end
 
       email.save!
       email