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
Simplelogin/proton, addy and duckduckgo have an alias service too. I didn’t check but I expect tuta, skiff and mailbox to have a similar feature.
I love SimpleLogin. I have my domain pointing to it so I can just do servicename@mydoma.in and it automatically creates the alias, I don’t even need to create it beforehand.