Email marketing is still an incredibly effective marketing tool--if you are doing it correctly.

Here are five email marketing mistakes that may be affecting your campaign's performance.

1. Not getting permission

Are you sending out your email marketing that haven't signed up for it? Then not only are you making a crucial mistake, you are also running afoul of the CAN-SPAM law.  This is huge mistake that you must stop right away.

2. Sending image-only emails

Did you know that Outlook and many other email programs do not show mages until the use authorizes their download? This means that if your email is all images, and no plain text, your recipients will not see anything except a bunch of red xes. Don't make your recipients work so hard! Send both text and images.

3. Sending too frequently or too many emails

When people sign up for your email marketing, they are indicating interest in getting information from you. However, they are not indicating they want their email box to be flooded with your stuff. And yet, some marketing feel that reach is not enough to cut through the clutter, and frequency is needed. Excessive frequency will not cut the clutter but may actually get you cut off entirely.

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