Able to send mail via SMTP, but not roundcube

Help with Setup/Upgrade
1

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My mail in a box server is able to receive submissions and send mails out via SMTP, but in roundcube, I keep getting this 451 Failed to add recipient error when adding any recipient.

The redacted part is my email address used to login to MIAB, any idea?

Thank you.

2

Solved, my smtpd_sender_login_maps was messed up. Thank you