Generate a list of common mistakes in a given topic
Input: Email marketing
Common mistakes in email marketing include:

1. Sending emails too often. 
2. Failing to personalize emails.
3. Using poor subject lines.
4. Including spammy keywords.
5. Sending emails in the wrong format.
6. Forgetting to include a link to the opt-out page.
7. Triggering spam filters.
Common mistakes in email marketing include spamming potential leads, using poor subject lines, sending too many emails, and using poor content. Additionally, poor formatting, too many images, and a lack of personalization can be off-putting for recipients.