deliverable 0.2.0
Verifies whether an email address is actually deliverable. Multi-port SMTP fallback, catch-all detection, and awareness of mail servers (Gmail, Outlook, Mimecast) that block SMTP probing — so it tells you when it doesn't know instead of guessing.
Gemfile:
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install:
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Runtime Dependencies (1):
valid_email2
>= 5.0, < 7.0