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Deliverability and your email domains
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With more and more stringent spam filtering products coming onto the market, it’s worthwhile to keep up with some of the newest issues that may affect your email campaigns.

Custom Domains

While some email service providers may lock you into using a From: address that they’ve already provided to you, the reason they do this is that it simplifies their system and reduces your chances that your outbound campaigns may be filtered.

At Boomerang, we offer the ability to use personalized custom domains in the From: line.  Of course, we require that you have access to an email address within the domain you plan to use in the From: line.  This verification process proves that you at least own an address within that domain.

By properly verifying your addresses, this also means you can use these verified addresses in the From: line with your campaigns here at Boomerang.  But, by using a custom domain, you may also run into issues related to the domain you use in that from line.

Spoofing

With the ability to use a custom domain in the From: line, comes additional issues that you my not be aware.  For example, if your From: line is From: “Jane Smith” <jane@myllccorp.com>, emails being sent to, for example fred@myllccorp.com may be blocked as spoofed.  Why is that?  Any given email server knows which domains it is authoritative.  That means, the mail server for myllccorp.com knows that only mail generated by this mail server may contain myllccorp.com.  So, if an email arrives from outside this mail server (for example, Boomerang sent the email), the mail server handling email for myllccorp.com may look at the email and determine that it didn’t create or originate the email and then either delete it, quarantine it or divert it to a spam folder.

So, how do you get around this issue?  You have to get your mail server administrator and/or IT staff involved.  They must be able to either whitelist Boomerang’s IP addresses to not be recognized as spoofed or they have to relax their spoofing blocking methodologies globally.

Most IT admins are not likely globally make a change to allow one mail server through.  So, whitelisting is the only other method.  This means you may need to obtain the IP addresses used to send your emails and then supply these to your IT mail administrator.

SPF and Domain Keys

Other technologies that may help include SPF (Sender Policy Framework) and Domain Keys.  These technologies use DNS of the domain used in the From: line to authenticate any given IP address as a legitimate sender for a specific domain.  Note, however, that not all mail administrators use SPF or Domain Keys, so these technologies will have limited benefits at corporate sites.  With large ISPs like Yahoo, Windows Live Mail and Gmail, these technologies are usually employed.

By that same token, however, I do not recommend sending emails from Boomerang with email addresses from hotmail.com, gmail.com or yahoo.com as the sender even if you do own that specific account.  If you are trying to sell a product or service for your company, you should always use a domain associated with the product or service.  Never use ISP domains as these make your products and services look much less legitimate to would-be buyers.  Domains are not that expensive to purchase and set up.  So, take the time to set up a web site and use an actual domain that you own and control.  Owning and controlling the domain is very important to using technologies such as SPF and Domain Keys.

Dedicated IP address

Additionally, Boomerang can provide you with a dedicated IP address for your company’s exclusive sending use.  With a dedicated IP address, you can much easier whitelist the IP and keep the whitelisting maintained.  Should any issues arise (blacklisting), it’s easier to manage this as well.  However, through proper list cleanup and proper verification processes (such as double opt-in processes), you can substantially reduce your chances of being blacklisted with a blacklisting service.

Through the use of whitelisting, SPF, Domain Keys and a dedicated IP address, you can improve your chances of delivery success.  There are even more advanced methodologies that can be employed, but these are the basic minimums necessary to maximize your deliveries at a fundamental level.  If you are having difficulties sending emails with the sender from a domain to that same domain, it’s likely the emails are being blocked as spoofed.  So, you will want to refer back to this blog article for tips on how to manage those issues.

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