JupiterResearch found that more than half, or 54%, of email marketers do not use an email delivery auditing tool to proactively improve results. The rate increases to 65% for those marketers who use in-house systems as oppose to email service providers. The report says that many marketers rely on post-campaign methods to identify delivery problems. JupiterResearch executive interviews revealed that investing in delivery services/solutions can improve email delivery by 10 to 20 percent.
Another recent report, Delivery Auditing Tools: Justifying the Investment, made a conservative estimate that marketers using an email delivery service will reduce their costs for delivered mail by two to 10 percent, in addition to increasing revenue by delivering more mail successfully to the inbox.
eINFO – a collection of articles and studies about email marketing