DKIM uses public-key cryptography to allow the signer to electronically sign legitimate emails in a way that can be verified by recipients. Prominent email service providers implementing DKIM include Yahoo , Gmail , and FastMail. Any mail from these organisations should carry a DKIM signature.
sender policy framework (SPF) records
SPF allows the owner of an Internet domain to use DNS records to specify which servers are authorised to transmit email for that domain.
most providers are using IP addresses, but it looks like the market is shifting to an IP/ domain pairing future for reputation monitoring. authentication, particularly DKIM and the publishing of SPF records, will help providers assign reputations more precisely, by tying this reputation to both sender IP addresses and sender domains.
delivery configuration / domain management
“ warm up” your mail server by throttling the rate at which it delivers the messages. providers will then start to view you as a reputable sender, when trust increases you can then, bit-by-bit, start to increase the rate at which you send. allows listen to delivery rate feedback from providers.
loads more information on our blog http://www.neteffekt.co.uk/threeboxes/email-marketing/sender-reputation-deliverability/ http://www.neteffekt.co.uk/threeboxes/email-marketing/am-i-a-reputable-sender/ http://www.neteffekt.co.uk/threeboxes/ thanks for your time...