davidtr

Thanks! I found the reason it didn’t work for me. Will write it here for next people who may encounter this.

The email was validated already, but the IAM policy I had in place for the SES user didn’t allow this to be confirmed by the plugin:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "ses:SendEmail",
            "Resource": "*"
        },
        {
            "Effect": "Allow",
            "Action": "ses:VerifyEmailAddress",
            "Resource": "*"
        }
    ]
}

I changed it temporarily to:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "ses:*",
            "Resource": "*"
        }
    ]
}

Then clicked on Refresh button at the top of the plugin settings page. Once the page confirmed that the address is verified then I reverted to previous policy. Actually I also removed from the policy the permission to verify address. So now, that the address is verified the IAM policy allows only to send emails.

Thanks!