Email Rendering – DNS Records
Email is a very versatile medium that can include customer acquisition (lead or sales), retention, cross-selling, up-selling, and more. But most everything out there that provides guidelines, best-practices, and advice on the application of the channel to your marketing efforts are largely geared toward bigger businesses.
DNS Records
Technical standards through which ISPs and other mail gateway administrators can establish the true identity of an email sender. Examples of proposed authentication standards include: SPF (PO Box, AOL), Sender-ID (Microsoft), DomainKeys (Yahoo), and DKIM (Cisco and Yahoo)
SPF – SPF (Sender Policy Framework) compares an email sender’s actual IP address to a list of IP addresses authorized to send mail from that domain. This list is published in the domain’s DNS record.
(v=spf1 mx a:72.72.722.722 -all)
Sender-ID – An authentication standard proposed by Microsoft, that compares an email sender’s “From” address to the IP address authorized to send email from that domain.
DomainKey – Email authentication system proposed by Yahoo! that checks an encrypted “key” embedded in each email sent against a list of public records to positively confirm the identity of the sender.
(a=rsa-sha1; c=nofws; q=dns; s=key; d=domain.com;
b=MK7Xo4FZvHKocEBGdLGS
ivZYLKkQGdBHIg5lzMsOhpdkDmdFR2g4U9J/
FgJbFHIZFePGsqrOjbadxW2fQUt5KVDv4VwxjNLz3VH7g
cxaP6gXEV2pzjkJewpqUw1AqonZZBar4xfSD
NQcbk7P5zO8IWcNxR2LfmUp3dMNVVaNmSY=;)
DKIM – Domain keys Identified Mail (DKIM) is a cryptographic email authentication method, making it possible to detect email forgery (“phishing”) by validating that the message actually comes from the domain that it claims to have come from. Signing outgoing messages with DKIM helps senders protect their domain and brand reputation against deceptive abuse by spammers.
(v=1; a=rsa-sha1; c=relaxed/relaxed; s=key; d=domain.com;
h=Date:From:Reply-To:To:Message-ID:Subject:MIME-Version:
Content-Type:Content-Transfer-Encoding;i=newsletter@domain.com;
bh=l/x9QxOt7C4DFAVVxMLIMWJFDbc=;
b=S/rTNu+o1XGpUkApy/nkyQZFl7K5HF1teOVFNW5uWKqmrbp6EuJ
2gPuUYn68U7CjpVTBoyJTLlP6
5HN7lxA6f94W7zoI5uXbI5tbgiRVDNoH9Gkx0pC1DZy
Zh6N6iKDyXli+lwkcIWe+hgicKqcBGUtK
ewXD15bEE055GmpiiwA=)
