MailEnable Professional 8.60 We have a primary mail server (MailEnable Professional) and a fallback/secondary mail server (MailEnable Standard). The fallback is smart hosted received emails to the primary server. The primary server hasn't whitelisted the fallback, and has the out-of-the-box anti-spa...

MailEnable Standard : 9.73 SMTP options: PTR record check -> Reject senders without PTR Two DNS Blacklist checks configured -> Don't accept the email when detected DNS Server: Google public DNS [8.8.8.8 / 8.8.4.4] I face a lot of inbound SPAM, which seems to be caused to a failting DNS lookup. See t...