Mail Filtering / Gateway

How do I report a false positive or a false negative?
Sometimes good messages are blocked, or spammy messages get through spam filter. We have a built in feature that allows you to report any message that was ...
Fri, 1 Feb, 2019 at 9:22 PM
Geographically Diverse Filtering Zones
Servers in multiple Geographic Zones We care about your data privacy and security as well as creating the most redundant network possible for your Spam ...
Fri, 1 Feb, 2019 at 8:24 PM
Worldwide Email Filtering Clusters MX Record Settings
We care about your data privacy and email security, some customer may prefer to have their email filtered exclusively in the European Union.  To accommodat...
Fri, 1 Feb, 2019 at 9:23 PM
Create a new Gateway service
For existing customers: Login to the Admin Portal Click Services >> Order New Services From the Email services Category select Email Gate...
Wed, 2 Mar, 2016 at 5:52 AM
Inbound SPF Failure
You are probably visiting this page because a message was blocked by our inbound mail server software with an SPF error along the lines of 1.2.3.4 does ...
Fri, 1 Feb, 2019 at 9:29 PM
MX Records with Redundant DNS Providers
The mailhop.org DNS is handled by DYN, we have now added Amazon’s Route 53 and Cloudflare as redundant DNS providers and have created multiple zones for...
Tue, 21 Aug, 2018 at 4:00 PM
Blocked Executable Extensions DLP
To prevent against potential viruses, we do not allow you to receive certain types of files, including: Certain file types (listed below), including thei...
Fri, 1 Feb, 2019 at 9:31 PM
500 Error Email Rejected
In SMTP, receiving a 5xx error is considered permanent. Historically this is the WORST thing that can happen to an email message. The remote server is tel...
Fri, 21 Apr, 2017 at 10:49 PM
Why is my email queuing on your server
The most common causes for high volumes of queued messages is whitelisting or firewalling of our delivery IP’s: 1. Whitelisting IPs on your Firewall. Yo...
Fri, 1 Feb, 2019 at 9:34 PM
Setting up an "inbound gateway" in Google G-Suite
When using DuoCircle Email Gateway Server or MX Backup in front of Google G-Suite you may encounter failed deliveries to your destination server with a 550 ...
Fri, 1 Feb, 2019 at 9:36 PM