We use MailChimp and its Mandrill add-on to send transactional emails.



  1. Create a MailChimp account associated with your GSA email address.
  2. File a new issue in the 18F/Infrastructure repository, stating:
    • What you need the account for
    • The approximate volume of emails you expect to be sending/receiving

See also: the Handbook page on Mandrill.


GSA will block any messages that are sent with a From address of, if the SMTP server is not managed (or whitelisted) by GSA. In other words, you can’t send an email with a From address of from MailChimp/Mandrill. Use a subdomain or another second-level domain instead.

Still have questions?

Ask in Slack: #admins-mailchimp.