If you look at the QSO log below, you'll see that my station received mail, but despite the fact that my VarAC send <SMR> the message was not saved.
01/10/2022 01:16:51 - INCOMING CONNECTION REQUEST.. Hold tight!
01/10/2022 01:17:07 - CONNECTED TO WD9DUI
01/10/2022 01:17:38 - WD4KAV> <AWAY> Sorry I missed you. Please leave me mail 73 de WD4KAV
01/10/2022 01:17:48 - WD9DUI> de WD9DUI <R-11>
01/10/2022 01:18:00 - WD4KAV> <R-12>
01/10/2022 01:18:29 - WD9DUI> <SM><TO:wd4kav><FRM:WD9DUI><SBJ:Fldigi><MSG:Still not working , have some kind of a bug as other programs work. This was working at one point , have not used it in months. Will let you know, will dig deeper! HA!>