Avoiding the Outlook junk filter
When creating your email campaigns you want to do everything you can to ensure that your mail reaches your recipient's inbox. Whilst most spam filters keep tight lipped about what would cause a message to be marked as spam, Microsoft has released a short guide of things to avoid getting caught in the Outlook junk filter.
You'll find the guide here: http://office.microsoft.com/en-us/help/HA010450051033.aspx
Most points there are fairly obvious and would never be used by legitimate mailers, but a couple there may catch people out who use a term in a legitimate way.
The guide is not a complete list and there are many other factors that could still cause your email to get blocked. It should also be noted that this guide is for the filter built into the Outlook client only.
Here at Suite26 we always advise you to test your email campaigns as much as possible in as many different email clients before sending. It's easy to register a Yahoo, Hotmail and Gmail account and just send a preview message to those accounts, but we would also recommend using an email testing service such as LitmusApp which will test your email in a number of different email clients and against lots of different spam filters.
Tags: filter, junk, litmusapp, outlook, spam, testing