Email missing from 'Sent' Folder

[memakino]

Last night I checked my 'sent' folder and it contained previous email I've sent over the past several months.    This morning, there is a noticible gap from 10:05 am this morning (April 14) and Nov 17, 2019.   Basically 5 months of my 'sent' email disappeared.   I did not delete anything, and nothing that would have been in my sent folder  appears in my 'trash' folder. 

Yes, I do have virus protection, and had not opened or done anything unusual with email between last night and this morning.

I've read forum messages about sudden email disappearnce and now undertand their frustration and sense of loss.

How can I recover those past email I've sent.

[ComcastCSAEmail]

i am seeing logs of an iPad email client accessing your email and then logs of email deletion shortly after. Can you check your iPad to see if the sent emails are in its trash/deleted folder?