This article contains some helpful information to explain why your messages might get flagged as Spam and explains what you can do about it. Spam filters change over time, but using these tips should help make sure your messages reach your contacts.
Some things to avoid include:
- Using Spam words and phrases
- This list contains words and phrases that commonly trigger Spam filters: http://blog.hubspot.com/blog/tabid/6307/bid/30684/The-Ultimate-List-of-Email-SPAM-Trigger-Words.aspx
Including too many images
Purchasing online email lists
In other words, know your recipients.
Sending attachments to large groups of people
Sending mass emails too close together
Sending many emails to many people in a short amount of time quickly triggers Spam filters.
- Using bright red or bright green font color
Here is a great article from MailChimp (a well-known and much-used mass email service) about common and not-so-common Spam triggers:
This helpful article from Qualtrics explains how to avoid being marked as Spam:
Following the suggestions above decreases the chance that your messages are marked as Spam.