I can't receive emails or send

[csr_arg]

We use Roundcube. When I try to send any email from my server it shows this error

¡Ha ocurrido un error!
Error SMTP (550): No se pudo establecer destinatario "recipient email" (No such recipient here).

And those who send me emails receive this email
550 Verification failed for <mymail@> Sender verify failed

Which may be? Check the maillog and it does not give a specific error

Thanks!

 

[csr_arg]

In the log of RoundCube, I have this error

SMTP Error: Failed to add recipient '[email protected]'. No such recipient here (Code: 550) in /var/www/html/roundcubemail-1.3.9/program/lib/Roundcube/rcube.php on line 1667 (POST /roundcube/?_task=mail&_unlock=loading1612200001101&_lang=undefined&_framed=1&_action=send)

 

[Richard G]

Please do not doublepost, somebody already answered here:

I can't receive emails or send

When I try to send any email from my server it shows this error ¡Ha ocurrido un error! Error SMTP (550): No se pudo establecer destinatario "recipient email" (No such recipient here). And those who send me emails receive this email 550 Verification failed for Sender verify failed...

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