diff --git a/addons/crm/crm_lead.py b/addons/crm/crm_lead.py
index cf7935dc160..8179ffa0541 100644
--- a/addons/crm/crm_lead.py
+++ b/addons/crm/crm_lead.py
@@ -23,8 +23,9 @@ from openerp.addons.base_status.base_stage import base_stage
 import crm
 from datetime import datetime
 from operator import itemgetter
-from openerp.osv import fields, osv
+from openerp.osv import fields, osv, orm
 import time
+from openerp import SUPERUSER_ID
 from openerp import tools
 from openerp.tools.translate import _
 from openerp.tools import html2plaintext
@@ -972,15 +973,18 @@ class crm_lead(base_stage, format_address, osv.osv):
     def message_get_reply_to(self, cr, uid, ids, context=None):
         """ Override to get the reply_to of the parent project. """
         return [lead.section_id.message_get_reply_to()[0] if lead.section_id else False
-                    for lead in self.browse(cr, uid, ids, context=context)]
+                    for lead in self.browse(cr, SUPERUSER_ID, ids, context=context)]
 
     def message_get_suggested_recipients(self, cr, uid, ids, context=None):
         recipients = super(crm_lead, self).message_get_suggested_recipients(cr, uid, ids, context=context)
-        for lead in self.browse(cr, uid, ids, context=context):
-            if lead.partner_id:
-                self._message_add_suggested_recipient(cr, uid, recipients, lead, partner=lead.partner_id, reason=_('Customer'))
-            elif lead.email_from:
-                self._message_add_suggested_recipient(cr, uid, recipients, lead, email=lead.email_from, reason=_('Customer Email'))
+        try:
+            for lead in self.browse(cr, uid, ids, context=context):
+                if lead.partner_id:
+                    self._message_add_suggested_recipient(cr, uid, recipients, lead, partner=lead.partner_id, reason=_('Customer'))
+                elif lead.email_from:
+                    self._message_add_suggested_recipient(cr, uid, recipients, lead, email=lead.email_from, reason=_('Customer Email'))
+        except (osv.except_osv, orm.except_orm):  # no read access rights -> just ignore suggested recipients because this imply modifying followers
+            pass
         return recipients
 
     def message_new(self, cr, uid, msg, custom_values=None, context=None):
diff --git a/addons/mail/mail_thread.py b/addons/mail/mail_thread.py
index 631119ad28d..83a1df96bdf 100644
--- a/addons/mail/mail_thread.py
+++ b/addons/mail/mail_thread.py
@@ -33,7 +33,7 @@ from email.message import Message
 from openerp import tools
 from openerp import SUPERUSER_ID
 from openerp.addons.mail.mail_message import decode
-from openerp.osv import fields, osv
+from openerp.osv import fields, osv, orm
 from openerp.tools.safe_eval import safe_eval as eval
 from openerp.tools.translate import _
 
@@ -419,7 +419,7 @@ class mail_thread(osv.AbstractModel):
         return ["%s@%s" % (record['alias_name'], record['alias_domain'])
                     if record.get('alias_domain') and record.get('alias_name')
                     else False
-                    for record in self.read(cr, uid, ids, ['alias_name', 'alias_domain'], context=context)]
+                    for record in self.read(cr, SUPERUSER_ID, ids, ['alias_name', 'alias_domain'], context=context)]
 
     #------------------------------------------------------
     # Mail gateway
@@ -1156,7 +1156,10 @@ class mail_thread(osv.AbstractModel):
         """ Add partners to the records followers. """
         user_pid = self.pool.get('res.users').read(cr, uid, uid, ['partner_id'], context=context)['partner_id'][0]
         if set(partner_ids) == set([user_pid]):
-            self.check_access_rights(cr, uid, 'read')
+            try:
+                self.check_access_rights(cr, uid, 'read')
+            except (osv.except_osv, orm.except_orm):
+                return
         else:
             self.check_access_rights(cr, uid, 'write')