Here is the log - it sends the first group, pauses and then does not connect back up.
[03] 5/22 23:15:32 250 Ok 0000013ecf626946-77c16d02-7ee7-42f8-91ac-74bd459f84ca-000000
[03] 5/22 23:15:32 ~ Stage 3 dispatch done
[03] 5/22 23:15:32 ~ Delay of 0s [00:00:00]
[03] 5/22 23:15:32 > QUIT...
I can confirm that this happens to me in SES.
It happened in my old 6.7 version and I just upgraded to the newest Mac version and it still happens.
I have tried numerous settings and it happens every time. It simply cannot reconnect.
Yet, if I manually stop the sending and then start it...