Hostnames for eximstats Rejections

I use eximstats to report my daily email traffic. I have a fairly high rate of rejections, and wanted hostnames listed in the rejection reports.    To resolve this I developed a patch to capture the hostname related to the IP address, and add this data to the rejection reports. The enhanced list saves me the […]

Securing your Email Reputation with SPF

SPF (Server Policy Framework) is a simple means to limit the ability of  others to forge your identity in email.  I first implemented it after a forged identity under my domain was used to send Spam.  Once SPF was configured,  the bounce messages quickly dropped off. Although not as frequently implemented as sender address checks, […]

Implementing DKIM with Exim

This article was updated in February 2014 to reflect changes policy and reporting options. The earlier ADSP (Author Domain Signing Practices) information has been removed. DomainKeys Identified Mail (DKIM) provides a method to confirm the origin of an e-mail. DKIM also provides some protection against tampering. Unlike SPF, this validation applies to the contents of […]