Apparently there's a rather critical security flaw in how automatic decryption of PGP and S/MIME emails works, and EFF just recommended nobody send or read PGP email anymore until it's fixed: https://www.eff.org/deeplinks/2018/05/attention-pgp-users-new-vulnerabilities-require-you-take-action-now
@raucao That's mostly fearmongering. https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060315.html
If you allow your email client to download remote content, you're in danger, always were and always will be. If not, you're safe with GnuPG.