Amazon is ending support for Signature V3 on September 30th 2020. Currently Amember is using Signature V3 for Amazon SES. When will there be a new update for Amazon SES in ammeter to use Signature V4?
We just released 6.2.7 with support of v4 signature for SES: https://www.amember.com/forum/threads/amember-pro-6-2-7-released.23652/