Automatically forwarded emails deleted from both accounts

IMAP (Internet Message Access Protocol):

• Think of IMAP as a central filing cabinet. Your emails are stored on the server, like files in drawers. Forwarding an email is like making a copy and placing it in a different folder in the same cabinet (Account B).
• Deleting an email from one account (drawer) doesn't affect the copy in the other (different drawer). Because both accounts access the same server storage, deleting on one account only removes that specific copy.

POP3 (Post Office Protocol 3):

• Imagine POP3 as a physical mailbox with limited space. Emails are downloaded (collected from the mailbox) to your device. Forwarding is similar to taking an email out, making a photocopy (the forwarded email), and putting the original back (original email in Account A).
• Deleting the original email on your device (Account A) is like throwing away the physical letter. The copy (forwarded email in Account B) remains unaffected, but the original is gone.

Here's the key difference:

• With IMAP, emails are stored and managed on the server, allowing for independent access and deletion across devices.
• POP3 downloads emails to your device, and deletion there removes the copy, potentially affecting other devices using POP3 for that account.

In simpler terms:

• IMAP keeps a central copy, so deleting on one device doesn't affect others.
• POP3 treats emails like physical copies; deleting one copy might affect others.

Choosing the right protocol:

• If you access your email from multiple devices and want a consistent view with the ability to delete from any device, IMAP is generally recommended.
• POP3 might be suitable if you primarily use one device and prefer to manage email storage locally.

Having the exact same problem. Two IMAP accounts - one for joint email and one for personal email. Messages to the joint email are forwarded to several personal accounts.

Set up like this so I can reply from the joint email when needed.

All good. Except an email filed in an IMAP folder on my personal account is deleted if I delete the original email Recieved on my joint account.

Which makes no sense, unless something is going on with message id's being the same (not exactly how that might work).