How do you address issues with emails marked as spam by recipient domains?

The approach of conducting a thorough review of domain authentication records is fundamental in addressing issues with emails being marked as spam by recipient domains. This is because proper authentication is crucial to establishing the legitimacy of the sending domain.

When emails are sent from a domain, recipient email servers often check several authentication mechanisms, such as SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance). If these records are not set up correctly or are missing, it increases the likelihood of emails being flagged as spam.

By reviewing and ensuring that these records are properly configured, you enhance the trustworthiness of your email communications. This can significantly improve deliverability rates and help ensure that legitimate emails reach their intended recipients without being redirected to the spam folder.

In contrast, changing the sending email address, educating users on sending practices, or limiting attachment sizes may not directly tackle the root cause of the issue regarding spam filtering, which centers on email authentication and credibility. Therefore, focusing on domain authentication records is the most effective strategy in this context.