The one thing The Bat! does not have is Lightning. Everything else is there.
Can it do the scheduling and monitoring I am looking for:
Thunderbird has the ability through an addon to send an email at a prescribed time, you can schedule an email to be sent at a certain time or send it to be a reoccurring email. It is really nice if you are working late at night and do not want to send an email at 2am. You can have it go at 8am ( during working hours). Does the Bat! have that ability? Any other email clients?Monitoring replies:
Thunderbird used to have a number of other add-ons that were extremely useful that have stopped working due to the changes touched on earlier in this thread due to TB development. There were a family of add-ons that allowed you to monitor replies. You could set the add-on to monitor IF an email had been replied to. When sending the email you would basically tell the add-on to notify you if they did not reply by a date of your choosing. Sucha simple thing, but you were able to automate a piece of follow-up. I traditionally set a monitor reply of a week. If somethig was more pressing, then I would make it shorter. Does the bat or any other email client have that?