Administrator (SuperUser) might delete messages

Message Delete
Odoo Tools
FREE
          902

Prevent adding partners/customers as followers

Disable Partner as Follower
BroadTech IT Solutions Pvt Ltd
FREE
          989

The tool to always open a full composer on the button 'Send a Message'

Send Message Composer
Odoo Tools
FREE
          117

Full re-definition of the message_post function to add extra context parameters

Super Mail
Odoo Tools
FREE
          1034
Fix mail error 553
IT-Projects LLC , Ivan Yelizariev
FREE
          335

Open a Pop-up Email Composer for All 'Send Message'

Email Composer Pop-up
Cybrosys Techno Solutions
FREE
          629

Your mailbox is full? you have difficulties following and controlling your customer communication? Then this module is for you.

IBS Helpdesk (NEW)
odoo.ma (IBS Group)
FREE
          1444

Simple Odoo mailbox

VietERP Mailbox
VietERP / Sang
FREE
1 1926

Chatter as history attachments

Message history in chatter emails
BroadTech IT Solutions Pvt Ltd
FREE
          85

The module is not any more supported

Mail no default suggest
Archived
FREE
          73
Fix non-ascii header 'from' (OBSOLETE)
IT-Projects LLC , Ivan Yelizariev
FREE
          139
Mark unstarred email as read, remove filter in 'To-do' folder
IT-Projects LLC
FREE
          165
Improvements for mass mailing
IT-Projects LLC , Ivan Yelizariev
FREE
          269
Menu for widgets at Messaging section
IT-Projects LLC , Ivan Yelizariev
FREE
          278
Outgoing mails menu
IT-Projects LLC , Ivan Yelizariev
FREE
          351
Sent Mails
Cybrosys Techno Solutions
FREE
          682
Trim partner's email
IT-Projects LLC , Ivan Yelizariev
FREE
          178