* bugfix: The addon was in conflict with another addon ("mail merge"). The drop-down list from the 'Send button' contained only items for "mail merge", none for SSR.

* bugfix: For TB >= v57 IP detection crashes. IP detection has been changed to asynchronous method.

* The addon is now compatible with Thunderbird from v57.* to v60.*.

* The addon has been upgraded so that it passes the v58/v59/v60 TB barriers.

* Some help message have been added.

* bugfix: In certain circumstances automatic detection when opening compose dialog did not work.

* Debug messages are now timestamped with local time.

* bugfix: Changes for setting 'Auto detection when opening compose dialog' were only taken in account when restarting TB.

* As the addon only applies for accounts set with default SMTP server, options dialog offers to easily change SMTP server for each account to default one.

* The addon offers now to define automatic detection rules based on IP address in order to set automatically the default SMTP server when changing from one location to another.

* The addon is now compatible with Thunderbird from v52.* to v57.0.

* The addon has been upgraded so that it passes the "v57" TB barrier.

* Initial version.