AdGuard Temp Mail’s addresses are temporary and aren’t stored long by design:
Emails are automatically deleted 24 hours after you receive them.
A temporary mailbox is deleted after 7 days of inactivity. But if you keep the page open or come back in a couple of days, it won’t disappear.
AdGuard Temp Mail is currently in beta stage. Here’s what we’re planning to add in the future:
Zero-access encryption
TLS support on the SMTP server side
Image proxying
Security checks for links
Do you still the have the link to news article where it was reported?
Earlier I was using Pi-Hole on my network then switched to AdGuard Home (not same as AdGuard DNS) as it is an open source product with in-built DOH support (yes, I can setup Pi-Hole to do the same, but that’s an extra manual configuration) and Privacy Guide seems to recommend it over Pi-hole. After reading your post, I tried to lookup more about it. Nothing on Wiki. Closest thing is this. If the allegations are true then I need to switch back to Pi-Hole.
That comment is just speculation… In fact many of the Adguard employees are from Ukraine and other not so pro Russian countries. I remember their support being almost stale when the war started.