How do I block spam on my email?

How to get off Yahoo Mail's SPAM block (for our legitimate, non-bulk email)?

• Our customers that are using Yahoo Mail are having all our emails sent to their spam folders. This is wrecking havoc on our business - they do not receive our invoices and other critical emails - most are not aware of spam blocking and never check their spam folder. We have implemented SPF and DomainKeys yet all the mails have a header "X-YahooFilteredBulk". How can we resolve this situation with Yahoo Mail? Surely there is a process for getting us off your list? We never send bulk emails - the emails always have less than five recipients, usually just one. We DO have images and links in some of our emails and some are sent automatically from a PHP program. Thanks! - Brian

• Answer:

  Your customers need to put your email address in their address book to stop this. Their spam filter doesn't recognize the address so that's where it sends it.