I couldn’t able to receive the account verification email when I deployed it on my server. Whereas the same SMTP credentials are working fine in a development environment.
I haven’t done SSL configuration for the site on the server yet.
Its a bit hard to diagnose without knowing which email provider you are using.
Also note, we’ve pushed out some breaking changes how sender email addresses are handled.
tl;dr you now have to specify an EMAIL_FROM environment variable setting the email address for the email sender. Also note, some email service providers are picky about correctly configuring the email sender address.