When we introduced the option to send emails via a custom SMTP server, a small bug slipped through that affected all emails – not just the ones sent via a custom SMTP server. Whoops.

First off, only emails to admins were affected by this issue, and it only occurred if more than one email address was specified. For example, if you added admin1@example.com and admin2@example.com, both would receive 2 emails when a new response came in with both of them as receivers.

That issue is now fixed. Every admin only receives one email per submission now, just as intended. Thanks for reporting and sorry for the inconvenience.