I’ve used Mailgun, SendGrid, G Suite; WP Mail SMTP handled the connection, and didn’t have this issue sending to subscribers.
The OSES table stores the subscribers’ emails in serialized entries. OSES isn’t unserializing them prior to sending. Are there issues in API syntax? Where can I go to fix? I’m 5+ days in (behind) – please assist!
[18-Jul-2019 21:29:44 UTC] WP Offload SES #202: There was an error attempting to send your email. (Failed to instantiate the AWS SES client. Check your error log.)
[18-Jul-2019 21:29:44 UTC] PHP Notice: Undefined offset: 1 in /home/<xxx>/public_html/wp-content/plugins/wp-ses/classes/Email.php on line 228
[18-Jul-2019 21:29:44 UTC] PHP Notice: Undefined variable: params in /home/<xxx>/public_html/wp-content/plugins/wp-mail-returnpath/index.php on line 17
[18-Jul-2019 21:29:44 UTC] PHP Notice: Trying to get property of non-object in /home/<xxx>/public_html/wp-content/plugins/wp-mail-returnpath/index.php on line 17