blacklisted_rcptto_emails: %w[c@c.com d@d.com] blacklisted RCPT TO emails not_registered_emails: %w[e@e.com f@f.com] Not registered (non-existent) RCPT TO emails response_delay_helo: 2 HELO response ...
Microsoft has discontinued basic authentication for personal Outlook.com accounts. This change affects Gmail's "Send mail as" feature, which relies on basic SMTP authentication. Since Gmail hasn't ...
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