A PGP encrypted email doesn't get "decrypted" when it's being transferred. That's the whole purpose of PGP encryption, to encrypt it before it even gets transferred or stored, which is what we do. If you set up a PGP key, use WKD, then your emails will be stored as encrypted (not only is your database encrypted with your password, but the emails themselves can be PGP encrypted this way), and any sender attempting to send to you will automatically have their message PGP encrypted to you, if it is not already (in case their mail client doesn't use WKD).
[1]: https://github.com/forwardemail/mta-sts.forwardemail.net/blo...
Also - you should note that we largely operate in-memory and don't store to disk any information or logs (unless essential, e.g. IMAP storage, or if they are error logs). We have all of this in our privacy policy and terms on our website. We are extremely transparent.
https://forwardemail.net/en/faq#do-you-support-openpgpmime-e...
Source code for PGP encryption for storage when you're connected (we only use your password in-memory, and never write it to disk on our side) @ https://github.com/forwardemail/forwardemail.net/blob/562a52...
Outbound email automatically checks for PGP key in case you didn't include the recipients (we use WKD): https://github.com/forwardemail/forwardemail.net/blob/562a52...
Your individual mailbox is a SQLite database file and is encrypted using ChaCha20-Poly1305 as well (using your password, which only you have access to; we only use it in-memory and don't write it to disk).
I have an alias [email protected] which forwards to [email protected]
The idea is when [email protected] gets an email through the [email protected] alias, they can also reply to it and it will show up as [email protected].
Simplelogin does this through a reverse alias, the reply to address is not the actual address, rather it's an alias for the reply-to address, so it can rewrite the message as if it came from the alias.
We've considered adding a E2EE comparison column as well (with the issues such as Proton rewriting your emails @ http://jfloren.net/b/2023/7/7/0 highlighted).
Privacy Guides Discussion @ https://discuss.privacyguides.net/t/forward-email-email-prov...
Unlike Skiff, Proton, and Tuta... we're _actually_ 100% open-source. Those providers that advertise as open-source really only open-source the front-end, when the back-end is the most sensitive part of an email service.