Why SendGrid Emails Go to Spam
Several factors can cause SendGrid emails to be marked as spam. Understanding these can help in troubleshooting and preventing future occurrences.
1. Poor Sender Reputation
Sender reputation is a score that Internet Service Providers (ISPs) assign to your email-sending IP address. A low sender reputation means your emails are more likely to be flagged as spam. Factors affecting sender reputation include high bounce rates, spam complaints, and sending to unverified email lists.
2. Email Content
The content of your email plays a significant role in spam filtering. Emails with excessive links, spammy keywords (e.g., “free,” “discount,” “winner”), and poor HTML formatting can trigger spam filters. Additionally, misleading subject lines or lack of personalization can make emails appear suspicious.
3. Lack of Authentication
Email authentication protocols such as SPF (Sender Policy thailand phone number Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting & Conformance) are essential for verifying the legitimacy of your emails. Without proper authentication, ISPs might mark your emails as spam.
4. Engagement Metrics
ISPs monitor how recipients interact with your emails Belgium Phone Number Low open rates, high deletion rates without reading, and frequent markings as spam indicate poor engagement, leading to more emails being sent to spam.
5. IP Address and Domain Blacklisting
If your IP address or domain is on a blacklist, your emails are more likely to be flagged as spam. Blacklists are maintained by various organizations to help ISPs filter out potentially harmful emails.
6. Unsolicited Emails
Sending unsolicited emails to recipients who haven’t opted in can increase spam complaints. It’s crucial to build a permission-based email list to ensure recipients expect and want your emails.
