Rated 5 out of 5 stars

0.6.0 works with tb 38.1.0 (and portable version, very usefull)
thank you! :-)

Rated 4 out of 5 stars

Same pb with 38 ...
a trick it you have an urgent email : "send later" work an message is sending when closing...

This review is for a previous version of the add-on (0.5.1). 

SMTP Control 0.6.0rc1 (Realease Candidate 1) is now available to correct the bug with SMTP selection.
You can find it here :
http://www.phpconcept.net/smtp-control/smtp-control-downloads

I will publish it on Mozilla web site as soon as I can, and then there will be a delay before the approval for publication.

Sorry for this bug, due to a change in some attribute value in message composer window.

Please let me know if you find an other abnormal behavior.