http://www.autoresponderpro.net/paid-autoresponder/
What is a good product auto responder that will send an ebook by email after the customer pays for it?
Please tell me an product autoresponder and not an email autoresponder for a website.
Aweber, the biggest? player in the auto-responder biz allows 1MB attachments, their help docs say in part:
You can attach up to one megabyte (1 MB) to any message you send out through AWeber. Many customers use this to send PDFs and other small files to their subscribers.
If you need to get a larger file than that to your subscribers, please contact our Support Team to discuss the situation.
Please bear in mind, however, that it’s not a good idea to send large files as email attachments. Due to the large number of viruses circulating on the Internet, email filters are more likely to prevent delivery of a message that has a large attachment.
A good alternative to attaching a file to your message is to place it on a page of your website, and then provide a link to that web page within your message body.
How To Pick The Best Email Autoresponder Service or Software For Your Business