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Hello, we successfully use this plugin across a number of sites however on this site we have a couple of (probably related) issues:
1. We are unable to change the settings. They look like they’re set correctly but no changes to these settings can be saved. The old settings always re-appear
2. We are unable to actually send. Everything is set correctly however the log shows that the plugin is attempting to send the email as root@localhost
SMTP Error: data not accepted.SMTP server error: DATA END command failed Detail: Message rejected: Email address is not verified. The following identities failed the check in region US-WEST-2: root@localhost, Root User
Is this some kind of permissions issue?