Mail Servers

Using MailHop Services with Firewalls
If you are going to restrict access to your mail server based on hostnames or IP addresses for MailHop, you will need to ensure our mail servers are fully whitelisted to prevent problems with your service.
E-mail, Mail Exchangers and DNS
This article explains Mail eXchanger (MX) records and their role in e-mail delivery.
Getting E-mail with Custom DNS
This article provides a step-by-step guide for determining if you require MX records and how to set them up if you do.
Why can't I connect to my server?
Okay, you've setup a host in our Dynamic DNS or Custom DNS service. However, you can't connect to this host using a web browser, FTP client, remote access software, etc. What is the problem?
Routers and Port Forwarding
This article explains some general information about routers and how to use port forwarding to host services behind them.
MailHop Message Filtering
Our MailHop services offer a variety of features to help combat unwanted e-mail. This article provides a detailed overview of these features.
DNS Caching
This article discusses how DNS information is locally stored and how to clear the cache.
How Dynamic DNS (DDNS) Works
Information on what dynamic DNS is and how it works
Reverse DNS
This article provides a basic overview of what Reverse DNS is and how to set it up in our various services.
Reverse DNS in Custom DNS
This article provides info on how to setup Reverse DNS in our Custom DNS service.
SPF and DynDNS.com Systems/Services
This document sets out some basic info on how to integrate our DNS and MailHop services with SPF (Sender Policy Framework).
MailHop Readmes
Important information to know about our MailHop services
MailHop How-tos
Creating and configuring MailHop services from start to finish
Using MailHop Outbound
We have developed specific instructions on how to configure some common mail programs to work with the MailHop Outbound service.
Comcast and MailHop Forward
After attempting to work with Comcast to resolve blacklisting issues, MailHop Forward will automatically apply spam scanning to comcast.net addresses after November 1, 2008.
MailHop Services and Postini
Why you cannot use MailHop services and Postini together
MailHop Forward Quick Guide
Instructions for setting up Mailhop Forward to forward from your domain to a third party email address