If you want to send emails for adult offers, you need to be careful about the SMTP provider you choose. Not all of them allow adult content, and using the wrong one can lead to account suspension. Some providers that allow adult traffic and also support bulk mailing include SMTP2GO, MailGun (with limits), and TurboSMTP. There are others like SendPulse and Postmark, but it's always good to check their terms first or speak to support before starting. Also, private or self-hosted SMTP solutions are another option if you want more freedom, but they need more setup and knowledge. It's important to stay within sending limits and follow best practices so your emails don't end up in spam. Adult content is sensitive, so you need to follow email laws and stay compliant. Do you know other providers that allow this kind of traffic and bulk sending? It would be helpful to hear about them.