back to post-office 3.5.0

requirements.txt

@@ -12,7 +12,7 @@ django-countries==5.5
 django-simple-captcha==0.5.12
 django-multiselectfield==0.1.12
 django-debug-toolbar==3.1.1
-django-post_office==3.5.2
+django-post_office==3.5.0
 django-fullurl==1.1
 sorl-thumbnail==12.6.3
 django-newsletter==0.9.1