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    Disable greylisting – emails from Office 365


    Office 365 sends emails from a lot of mailservers. retrys are often from a new IP.
    Then you have delays of 5 min + 5 min etc…

    Office 365 uses this IP’s:
    https://technet.microsoft.com/en-us/library/dn163583

    In your Mailscanner, you can Whitelist Office 365 Exchange IP’s by adding them to this:
    /etc/sqlgrey/clients_ip_whitelist.local

    OR
    /etc/sqlgrey/clients_fqdn_whitelist.local
    *.messageslabs.com
    outbound.protection.outlook.com
    *.outbound.protection.outlook.com
    *.microsoftonline.com
    *.hotmail.com

    /etc/init.d/sqlgrey restart