Compatibility with MDN and DSN

[wroderich]

I use send later quite often. It does not work, however, with requesting MDN and DSN, i.e. delivery and reading notification. This requires to disable the whole add-on of send later.
I request that either a one-time-disable button be implemented or a button of "send immediately" which does not interfere with MDN and DSN request.
Thanks in advance

[jikamens]

I am not sure why you say "This requires to disable the whole add-on of send later." If you have DSN enabled by default and you want to send a message with Send Later, then—as the pop-up error you get says—you just need to disable the DSN option on that particular message before sending it.

Until a couple months ago it was impossible for Send Later to support DSN, however it appears that this will be fixed in Thunderbird 125: https://bugzilla.mozilla.org/show_bug.cgi?id=815638 . So it should be possible for DSN to work with Send Later. I will leave this issue open to remind me to look into that.

I request that either a one-time-disable button be implemented

As I noted above, that already exists. Just disable DSN from the options menu for the message and then Send Later will work. The pop-up error tells you to do exactly this, so I'm not sure where the confusion is here.