It was announced by the upstream provider of OnePoundEmail that the Rainloop instance would be discontinued on September 30th 2022.

It is advised to immediately backup any data you may have in the existing Rainloop instance, specifically contacts, to prevent data loss.

The /rainloop login link will automatically begin redirecting to it's replacement, /snappy. 

Snappy is a fork of Rainloop with added security enhancements and features and your general usage will stay the same.