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  alhilal@cats-net.com
    host mx.cats-net.com [196.45.144.124]
    SMTP error from remote mail server after RCPT TO:<alhilal@cats-net.com>:
    550 No such person at this address."
  ali.zaidi@graseby.co.uk
    host graseby-co-uk.mail.protection.outlook.com [104.47.74.10]
    SMTP error from remote mail server after RCPT TO:<ali.zaidi@graseby.co.uk>:
    550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [BN8NAM04FT064.eop-NAM04.prod.protection.outlook.com]
  alhabshi@qatar.net.qa
    host mail.qatar.net.qa [82.148.101.101]
    SMTP error from remote mail server after RCPT TO:<alhabshi@qatar.net.qa>:
    550 5.1.1 rZYgmlpUfEWf2rZYhmTpvM Recipient Rejected [503]