March 24, 2017

How do you ensure that the IPs of your outbound servers are not blocked in popular RBL sites

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Typically  IPs get blacklisted when the the outbound relay servers send out spam  and this is detected/noticed by worldwide blacklist resources. In the  case of Mithi SkyConnect, all outbound traffic is routed via SMX and is  scanned for virus and spam to ensure that only clean mail leave the  periphery. This reduces the chance of IP blacklisting down to near zero.

Since we moved to this architecture, we’ve stopped worrying about  blacklisting of our outbound IPs. Another thing we care about is the DNS  hygiene of our customers. We ensure proper configuration of SPF, DKIM  etc to ensure that the reputation of our customers’ domains is very  high.

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