[hamoperator]

Mailchimp (or Mandrill if you want the API backend) is free for first 12k emails per month. If you are only sending it once, it shouldnt be an issue.

Better to use that then SendGrid since it'll less likely to hit spam folders.

It does sound a bit like spam since this will go to every single email account that has mailed you or you have mailed before. Would it be better to just use Facebook / Twitter / Linkedin + email ~200-300 people.

[almogK]

So I can't use Mailchimp as it cost per subscriber or contact, Mandrill is fine they just updated their pricing and removed the 12K free per month. This is why I went with SendGrid.

Can't use Facebook or LinkedIn I don't connect with everyone I email.

[hamoperator]

I didn't realize the pricing changes. Mandrill is super easy and its $10 for 25k emails. But Sendgrid sounds fine too.