Email Delivery Issues to Messagelabs

I need a solution

Hi,

I’m looking to get some assistance with issues we’re having with email delivery to users of the messagelabs filtering services

We provide email hosting services for a large number of businesses in Australia and we’ve been seeing some intermittent delivery issues to the messagelabs servers over the past week. It appears emails sent from some of our IPs are being blocked or rate limited causing delivery delays and eventually bouncebacks.

Our servers send from the following IPs:

203.113.244.211

203.113.244.212

203.113.244.213

203.113.244.214

203.113.243.211

203.113.243.212

203.113.243.213

203.113.243.214

The message labs servers are returning the following message when we attempt to deliver: Reason: 4.3.2 – Not accepting messages at this time (‘421’, [‘Service Temporarily Unavailable’]) []

I’ve checked our IPs on the IP Reputation Investigation page and none of them have a bad reputation, any assistance or guidance we can get on how to resolve this issue would be greatly appreciated.

Thanks.

0

Related:

  • No Related Posts

Leave a Reply