Hmm, I'm not finding any options in #ProtonMail to forward a few addresses in my domain somewhere else. 
@zigg
Are they hidden in the paid features?
@dumpling It seems unlikely, given it's not documented anywhere, but I've inquired of both support and someone else who reported switching their domain over recently
@zigg
Cool, I've never looked for that feature, but now I'm curious!
For reference, here's what I found: https://protonmail.uservoice.com/forums/284483-feedback/suggestions/15353520-forwarding-mail-from-protonmail
@sina @dumpling Based on my reading, ProtonMail keeps the public key your browser generated and encrypts any unencrypted mails they receive on their way in. Any mails you send unencrypted are also stored encrypted in your sent folder, though of course they'd need to go out cleartext.
In short, they do not have access to the keys to decrypt any of your mails at rest, though they could theoretically see them as they transit over SMTP.
