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greg@gmail.com: host gmail-smtp-in.l.google.com[2607:f8b0:4023:1407::1a] said: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser n21-20020a81af15000000b005a1d57d9878si2842526ywh.457 - gsmtp (in reply to RCPT TO command)