Send email to joshwheeler at this domain. To encrypt, use my public key; or keybase for an easy copy/paste if your client does not support encryption.
To add encryption into your existing workflow, follow one of these articles:
Instant messages can be sent to joshwheeler at this domain or firstname.lastname@example.org
XMPP (originally Jabber) is a free, cross-platform messaging protocol supported by mobile and desktop.
If you don’t have an XMPP account, just ask
More XMPP clients