As an email marketer, your ROI depends on your emails reaching your intended audience. This becomes much more difficult when you have a poor email sender reputation.
Email sender reputation is a score associated with your mail server’s domain name or IP address. Internet Service Providers (ISPs) use this reputation to determine whether your emails should be delivered to their users’ inboxes or filtered as spam.
Similar to a person’s reputation, the better your email sender reputation, the higher the likelihood that your emails will successfully reach your audience. You can monitor your email performance and reputation using tools such as Google Postmaster Tools.
The exact formula used by ISPs to calculate sender reputation is not publicly disclosed. However, several factors have a significant impact on your reputation.
When you acquire a new mail server or change your hosting provider, your IP address will not yet have an established sending history with ISPs. If you immediately send a large volume of emails without gradually building your sending reputation, you may trigger spam detection systems. The same applies when using a newly registered email domain.
Solution: Perform IP warming before sending large email campaigns. Gradually increase your email volume to build trust with ISPs.
If you use a free tier or a lower-cost plan from an Email Service Provider (ESP), you may share the same mail server IP address with many other users. If some of those users send spam emails, their activities can negatively affect the reputation of the shared IP address.
Solution: Consider upgrading to a plan that includes a dedicated IP address. With a dedicated IP, your sending behavior will have a direct impact only on your own sender reputation.
Using an ESP to send your email marketing campaigns is recommended because these platforms can help monitor important metrics, including bounce rates. A high bounce rate indicates that many emails cannot be delivered, which can negatively affect your sender reputation and reduce your inbox placement rate.
Solution: Remove bounced email addresses from your mailing list. A better approach is to validate your mailing list before sending campaigns by using MailboxValidator Bulk Validation to identify and remove invalid or outdated email addresses.
ESPs also monitor your spam complaint rate. A high complaint rate indicates that recipients are marking your emails as spam, which can seriously damage your sender reputation.
Solution: If you are not sending spam, review your email content and targeting strategy. Generic or irrelevant emails are more likely to frustrate recipients and result in spam complaints.
Personalize your emails by using recipients’ names and tailor your content based on their interests. Additionally, make sure your unsubscribe link is clearly visible so recipients who no longer wish to receive your emails can easily opt out instead of marking your emails as spam.
