We are still actively working on the spam issue.
Self Hosted Email
See also: Setting_up_a_Server#Setting_Up_Email
The only way to have full control over your email is to host your own mail server.
A Mail eXchanger Record (MX record) specifies a mail server responsible for accepting email messages on behalf of a recipient's domain, and a preference value is used to prioritize mail delivery if multiple mail servers are available. The set of MX records of a domain name specifies how email should be routed with the Simple Mail Transfer Protocol (SMTP).
A Sender Policy Framework (SPF) record identifies which servers are ALLOWED to send email on behalf of your domain. The idea is to help prevent domain spoofing by spammers. If a spammer tries to use your domain to forge email, the receiver can check your SPF record and, if it doesn't match, reject it outright. These days most mail servers check for SPF records, and if they don't find one, they will also reject your mail - so you need one.
A DomainKeys Identified Mail, or DKIM entry provides a 1024-bit public key, unique to your domain, that confirms that an email is actually from a legitimate account on your server. It is a complementary check to SPF records. It is not as widely used as SPF yet, but is in use by Gmail and Yahoo, and should be set up anyhow.
Mail Transfer Agent (MTA)
Mail Delivery Agent (MDA)
- How to set up a mail server on a GNU / Linux system - flurdy.com