every email i send is stuck in Postfix Mail queue

i have another server, every new mail account got this message when open roundcube. can not recieve or send any message.

and the old email account can send messages but can’t recieve messages

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Edited December 3Dec 3 by Leebrimlow

this code gives me this error:

/scripts/cwp_api account mail_fix_permissions

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i fixed it now by selecting only in Postfix Mail Server Manager :

• Install DKIM & SPF

• Install Policyd

So SpamAssassin, AMaViS and ClamAV are disabled