How to increase the Sent Emails limit per Hour

[Dinkesh]

My domain has exceeded the max emails per hour (63/50 (126%)) allowed.

How do I fix this error. How do I increase the number of emails to be sent per hour. Where do I find this option in RoundCube ??

[SKaero]

That isn't something that is controlled by Roundcube. Contact your email provider.