Thanks for reaching out! We're glad to hear that you're interested in MailVibes.

To better assist you, could you please provide more context about the specific tagging feature you're referring to? This will help us determine if MailVibes has the functionality you're looking for.

Also, regarding your question about custom SMTP, MailVibes currently does not offer this feature. However, we are always looking to improve our platform and add new features, so stay tuned for any updates!

Let us know if you have any further questions or concerns.