Emails to "gmail.com" accounts are bouncing back from my domain e-mail.

Emails to gmail recipients are bouncing back due to DKIM and/or SPF not being setup correctly.

Can someone assist with this?  Thank you in advance.

    host gmail-smtp-in.l.google.com [142.250.102.27]

    SMTP error from remote mail server after pipelined end of data:

    550-5.7.26 This message does not pass authentication checks (SPF and DKIM both

    550-5.7.26 do not pass). SPF check for [packmailplusnc.com] does not pass with

    550-5.7.26 ip: [66.96.184.1].To best protect our users from spam, the message

    550-5.7.26 has been blocked. Please visit

    550-5.7.26  https://support.google.com/mail/answer/81126#authentication for more

    550 5.7.26 information. ba4-20020a0564021ac400b004bff6dee492si7905484edb.149 - gsmtp

Thanks,
Steve Joyner