Error 553 Relaying Disallowed

[JLX89]

Hello All!
Has anyone had any issues with getting bounce back messages on Error 553 Relaying Disallowed? Currently, we're trying to forward emails from a specific inbox (contact@domain.tld) to a external email address. We have a Forward rule in Roundcube setup to Redirect the message, but we're getting a bounce back with a 553 error.

Any suggestions or assistance with this would be greatly appreciated!

Thank you!

[girish]

@jlx89 Haraka does not use this error code, so I suspect this is coming from the other mail server. A quick search suggests this often comes from zoho servers. Are you forwarding to zoho? Maybe you can check what they expect?

[JLX89]

@girish Yes, we are using them for transactional email. I'll go ahead and run this down with them. Your answer on Haraka helps out -- thank you so much!