Custom fields are chunks of html/text that you create in adminpanel and send them in emails.

For example: You want to send same footer in all html emails. Then you will create a 'general-footer' custom field. Script generates a tag for you like [general-footer]. If you keep this tag in out going email, all emails go with this SAME footer.

• If you want to change the footer, you can just change it in one place. NOT ALL emails. That is the advantage of custom fields.
• You can create signatures, ads, promotional links, header and footer files etc. So its easy to insert in to all emails.

You can also:

• Create general custom tags that goes in ALL emails. OR
• Specific custom fields to one particular autoresponder.

You can also have:

• html version and
• text version of custom fields.

So they go in respective email formats.

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