I have a Mailman server with Dreamhost that is used for a discussion list to distribute information among about 50 members. My members with yahoo.com accounts have been reporting that they are receiving e-mail after a lengthy delay or not at all. I'm afraid that my Mailman server domain has been graylisted by Yahoo.
Is there a way to add domainkey identified mail header to a dreamhost subdomain?
Other ideas for how to solve this?
Thank you very much in advance for any ideas.