An email payment gateway may be configured to send emails to potential donors. The emails may include mailto hyperlinks. Each mailto hyperlink may be associated with one or more fundraising campaigns, and each mailto hyperlink describes an email message that may be generated when that hyperlink is selected. When a mailto hyperlink is selected, the generated email message may include one or more parameters related to the fundraising campaign associated with the hyperlink, such as an identifier of the fundraising campaign, donor identity or donation amount. The generated email message may then be transmitted to the email payment gateway. The email payment gateway may receive the message and, based on the parameters in the received message, process the donation on behalf of the donor.