diff --git a/src/calibre/gui2/email.py b/src/calibre/gui2/email.py
index bfd9f76470..f6a4dd74dc 100644
--- a/src/calibre/gui2/email.py
+++ b/src/calibre/gui2/email.py
@@ -123,7 +123,10 @@ class Emailer(Thread): # {{{
             job.failed = failed
             job.exception = exc
             job.job_done()
-            job.email_sent_callback(job)
+            try:
+                job.email_sent_callback(job)
+            except:
+                pass
 
     def send_mails(self, jobnames, callback, attachments, to_s, subjects,
                   texts, attachment_names):
@@ -191,7 +194,6 @@ class Emailer(Thread): # {{{
 
 # }}}
 
-
 class EmailMixin(object): # {{{
 
     def __init__(self):