TempMailAddress - The TempMailAddress protects your primary mailbox. TempMailAddress.
Bluetick.io - Personal touch at scale for all your follow-up emails
33Mail - Simple free disposable email address service, unlimited free disposable email addresses.
FlowUp - AI-Enabled Omnichannel Automated Lead Follow-up System
Moakt Mail - Moakt is a temporary mail that expires after an hour from the time it is created.
Rebump - Automatic follow up emails. Keeps on bumping until you get a reply.