Utter bulll!! If you set the pop client to ‘do not delete messages on the server’, it doesn’t. I have my mobile set to ‘do not delete messages when they are deleted on the server’, because certain messages I keep for longer.
I have a desktop client that fetches every mail box once per 10 days, and deletes the messages from the isp servers, both pop and IMAP. Then, I periodically search mobile inbox for spam strings, select all, and delete.
Unless you set the client to ‘delete messages when deleted on server’, they’re going to remain. It doesn’t matter whether you resize the folder.That doesn’t tell K 9 to delete anything! And even ‘delete’ only puts it in the trash. So, you have to clear that out from time to time.
I let my main mobile inbox fill up to maybe 4-5000 messages, and search for spam keywords, such as ‘warning’, ‘love’, ‘girlfriend’, ‘drugs’, ‘free’, ‘car’, ‘vacation’, ‘discount’, ‘congress’, ‘conservative’, ‘liberal’, ‘lust’, ‘pharmacy’, and nuisance domains.
I usually get 3000 messages gone in 5 minutes, by getting search hits, and manually deleting them all. If I delete something good, it’s always going to be on the desktop, because that is the only device set to delete messages off the isp’s mail servers. I look through once a week, just
to be sure. And that client saves everything until I manually remove it.
So, I never need to worry about losing anything.
The email client on the PC is backed up with everything else, so if the drive in the PC fails, it doesn’t matter.
I never use the cloud! They say, if you lose the key, password, or whatever else; not even the cloud service can retrieve your files. They mean they won’t retrieve files for clients who have lost access. Otherwise, they’d be vulnerable to government searches, and rubber-hose cryptanalysis (not pretty). But if they make clear to everyone that they cannot retrieve files if the client loses access, they can tell governments and criminals, we don’t have the capability!
Well, where did the key come from? Did you make it yourself? No the cloud service gave it to you. How difficult is it to retain copies of cryptographic keys? Access goes to well-heeled, and law enforcement who are willing to pay, big time.
When law enforcement claimed they couldn’t access an Apple phone owned by a mass shooter, that they needed help from Apple, there was forensic software available to instantaneously crack the security on that phone, for 1400.00USD. They just want to lull the public into a sense of security that law enforcement can’t get into their mobile devices, which makes people more lax in security, which doubles the effect. Don’t use cloud backup or applications! It’s cheap up front, but it will be expensive in the end! It’s only private if you have control over physical access to the hardware, and you make the encryption keys yourself!
Sorry for my long post, but I like to hide tidbits randomly, here and there.