Add caveat to email section.

content/contact.md

@@ -12,7 +12,7 @@ Response time always varies. Please also see my {{% external-link "Public Notice
 
 These are where I feel most free to communicate.
 
-- XMPP - me@hyperling : [URI](xmpp:me@hyperling.com?roster;preauth=kBpnKRImsFaN1bPKhUORp5Ri;ibr=y;omemo-sid-1451886255=20b4ce3ea57bfeecd899bad2821d2c5bdb4a784ba812781e3b871f369385a708;omemo-sid-1256480968=431b7b9d5e613b29ab583cfc5a6fe3d538b8c58a99d346b819fd0d316cf6d321) [URL](https://xmpp.link/#me%40hyperling.com%3Froster%3Bpreauth%3DHHMka3X3nfrfdv1r3EFoDVHl%3Bibr%3Dy)
+- XMPP: [[URI](xmpp:me@hyperling.com?roster;preauth=kBpnKRImsFaN1bPKhUORp5Ri;ibr=y;omemo-sid-1451886255=20b4ce3ea57bfeecd899bad2821d2c5bdb4a784ba812781e3b871f369385a708;omemo-sid-1256480968=431b7b9d5e613b29ab583cfc5a6fe3d538b8c58a99d346b819fd0d316cf6d321)], [{{% external-link "Invite" "https://xmpp.link/#me%40hyperling.com%3Froster%3Bpreauth%3DHHMka3X3nfrfdv1r3EFoDVHl%3Bibr%3Dy" %}}], me@hyperling.com
 - [SimpleX](https://smp19.simplex.im/a#tSXsd7M_lDktSRVePuVeTReUKEv1hsiPwaTWlneRIZ0)
 - [Session](/session)
 
@@ -21,6 +21,11 @@ These are where I feel most free to communicate.
 These are reliable forms of communication, even if not the most private / secure.
 
 - [Signal](https://signal.me/#eu/1VgXuFLsYnI5zKSyvhcc6KqFd6AJp2AlzACDIwgsuUsLVEI4WBdH763TEjQpZPpX)
+
+Please use a secure provider such as Proton Mail, Riseup, Atomic Mail, etc.
+ Addresses from big tech domains (gmail, yahoo, outlook, etc) may be ignored
+ at my discretion, especially if used to communicate private or sensitive data.
+
 - [Email](mailto:me@hyperling.com)
 
 ## Meh