On the dubious merits of email verification services

This commentary critiques common practices used by email verification services, arguing that verifiers should establish and maintain their own stable domain and IP reputation rather than issuing many disposable domains/IPs per client. It explains that verifiers use SMTP probes which can affect receiver logs and delivery, and it clarifies appropriate use-cases for verification (e.g., preventing bot signups or real-time address correction) while noting verification does not replace consent or ongoing permission for mailing.