Probe existing email contacts upon installation for easy onboarding

[irvan-putra]

I think most of the proposals have outdated assumption about how DeltaChat works, i also just realized it with the closing of WKD topic, that DeltaChat won’t publish the public keys:

The life-changing magic of WKD

anyways, this seems to be diverging a lot from the initial topic, so let’s resume the answer to the initial question and close it, if something different needs to be discussed or problems reported, better create new on-point threads: it is unlikely we ever support WKD, we don’t want people to discover public keys, that is in direct contradiction with the anti-spam protection of open-registration email servers (a.k.a chatmail)

So with that, we won’t realize if that contact actually use DeltaChat.

I think at this point, if DeltaChat still support sending email to classic-email (see FAQ - Delta Chat ), we can just auto generate an invite link to chatmail in the footer of the email, so the other party will realize that they can continue the conversation at DeltaChat.

So with that, side-stepping the possible spamming if we just automate the probing.