I think only good alternative to mobile numbers is email

[securitybrahh (Sovereign Shadow)]

Ok so these are stuff I found that seems relevant

Everything You Need to Know About Email Encryption in 2026 - Dhole Moments

PGP/OpenPGP under recent vulnerabilities – implications for ProtonMail and email security

Hi everyone, I wanted to start a discussion about recent vulnerabilities discovered in GnuPG, the most widely used implementation of OpenPGP. Some of these flaws allow modifying the plaintext shown when verifying a signature or altering local files, which raises questions about the security of encrypted email practices [*]. While OpenPGP remains a mature standard for email encryption, these issues highlight its limitations for modern security needs: No forward secrecy (if a key is compromis…

Best email provider for travel to China?

Hi everyone, I’m planning to travel to China. What is a good email provider to use in China for activities such as booking hotels, trains, and other travel-related tasks?

PrivacyGuides' email-security page is misleading

The page at: Contains extremely misleading information: Email metadata is crucial to the most basic functionality of email (where it came from, and where it has to go). this is true for virtually all other messaging platforms, like XMPP, Matrix, IRC, WhatsApp, etc. to deliver a message obviously the server needs to know from whom and to whom to deliver the message, it is super weird that this site list it as a special “metadata leakage” in email. and some email data can never be encrypte…

Email Security: Where We Are and What the Future Holds