opentrade: node main.js error

When I try node main.js It responds with mx resolved: [ { exchange: 'mx00.mail.com', priority: 10 }, { exchange: 'mx01.mail.com', priority: 10 } ] MX connection created: mx00.mail.com recv email.com>554-mail.com (mxgmxus002) Nemesis ESMTP Service not available recv email.com>554-No SMTP service recv email.com>554 invalid DNS PTR resource record, IP=142.93.220.147 SMTP responds error code 554 How to fix