SMTP (email) plugin stopped working over SSL?
If you use a free SMTP plugin for WordPress which offers email delivery on behalf of your domain for things like contact forms, lost password, etc. please be aware that SMTP does not function over an SSL connection. We recommend you either switch to using the oAuth API from Google (Gmail) which there is a free plugin for called Postman (a bit tedious to setup however), or better we recommend you order SendGrid which is free forever after a one-time setup fee.