Question: Is there a service that can verify email addresses in bulk to ensure they're valid and can receive messages?

If you need a service to check email addresses in bulk, EFinder is a good choice. It can harvest, validate and deliver email addresses and phone numbers from websites and text files. EFinder also has a premium email validation service to verify whether addresses are legitimate, and it doesn't store or share the addresses it finds. It comes with a free plan with 15 monthly credits and three paid plans for different usage levels.

Another powerful tool is pipl.ai, which uses AI to optimize cold outreach campaigns for better deliverability. It has built-in email validation and data enrichment, and you can track real-time campaign metrics. pipl.ai integrates with popular email service providers and lets you customize warm-up settings to get your emails into inboxes. It offers a personal plan at $37/month and a business plan at $77/month.

If you're looking for an all-in-one solution, Instantly is a sales engagement and lead intelligence platform that automates outreach and has features like email validation and bulk domain testing. It lets you send thousands of emails per day without harming your sender reputation and offers a range of pricing plans for different company sizes.

Last, Snov.io is a sales engagement platform that automates sales workflows with tools for finding and validating leads, sending follow-ups and improving deliverability. It includes an email finder, multichannel campaigns and email warm-up, and integrates with more than 5,000 tools. Snov.io is available in multiple languages and offers a free plan, so it's good for businesses of any size looking to boost revenue and growth.