Improve Default Address Handling for Forwarded/BCC Emails
Currently, the "Default Address (Custom Domain)" works only when emails are sent directly to it or to linked catch-all addresses. If the domain's MX does not point to Proton (e.g., it points to a forwarding service), Proton uses the actual recipient address (usually @proton.me) instead of my Default (Custom Domain) address when replying.
Note: In this scenario, it does not work even if the Custom Domain address is already set as the Default.
Example: domain.com points its MX to a mailing list, which then forwards emails to my @proton.me and @gmail.com mailboxes. When a sender emails to @domain.com and the message is forwarded to my @proton.me address, I can't automatically reply using my Default Address (@domain.com). I must manually switch the From address from @proton.me to @domain.com.
I suggest adding checks for forwarded and BCC emails (i.e., in scenarios where "Header To ≠ RCPT TO"):
If "Header To ≠ RCPT TO", check whether the Header To address matches the user's Default Address.
If yes, use the Default Address when replying; otherwise, follow the existing Reply logic.
This ensures that replies consistently use the user's Default (Custom Domain) Address even for forwarded and BCC emails.
Anonymous
shared this idea
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Hans Caspers
commented
There is no reason that this should not be supported. If sending by default from a custom domain without MX pointing to Proton is supported, replying and forwarding should also allow the sender address to be that custom domain.
Please fix this as it is really an unnecessary but highly annoying 'bug'.
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John Erik Setsaas
commented
Note that this is valid for reply, but also responses to the meeting invites.
Just to show very clearly what I want, here is a screencast with my comments.
https://drive.proton.me/urls/GSQWYMDDY4#Vd0BYPQcyBHo -
John Erik Setsaas
commented
Currently, I have for EVERY email I reply to, verify that the sender is set correctly to the email to which it was sent.
This should be a very simple UX feature to implement. Please put priority on this.
Thank you.