This article provides 10 helpful tips for building a Code Your Own (CYO) campaign or a formatted template with the HTML block in the campaign editor.

Our easy-to-use drag and drop editor makes it a breeze to insert your own code into your mailings. For those more advanced with HTML, you can use a CYO campaign to design your campaign from top to bottom with your own HTML code. Check out these tips and recommendations for designing emails using your own HTML.

Ⓘ	Emma does not offer support for customer-created code, so it's crucial that any person using HTML code is formidably experienced. We do have a talented Design Team that can handle creating the custom HTML coding for you for an additional fee.

Top 10 tips for using HTML code in a campaign

1. Don't send one large image in an email. This is a red flag to receiving servers and can seriously affect your deliverability.
2. Remove <body>, <head>, <meta>, <title>, <html>, and doctype tags from your HTML.
3. Use an HTML markup program like HTML Tidy to ensure you've closed all HTML tags.
4. Don't use image maps. Similar to sending one large image only, this is a red flag to receiving servers and can seriously affect your deliverability.
5. Avoid colspans and rowspans.
6. Inline styles are the most solid way to style your emails.
7. Images should be jpegs or gifs, RGB color values, 72 dpi.
8. Be sure to send a test of your CYO campaign to a handful of email programs so that you know that it looks good on all of them.
9. Include an opt-out link and a physical mailing address in the email's footer to comply with CAN-SPAM.
10. Always review and send a test of your campaign to yourself and someone else before sending it out to your list to double-check for errors.

Additional resources

• Ways to use HTML code in your campaigns
• HTML styling, backgrounds, and alignment
• Using HTML code for tables
• Using a Code-Your-Own (CYO) campaign
• Mobile tips for building a CYO campaign
• How to use the HTML block
• Images: Specifications and tips