Free Must have Wordpress plugins

I personally use all of these plugins on every single website I create with wordpress.

The free wordpress plugins can be used with any wordpress theme.

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[CalvynLee]

I am using maiwilzz, and divi email opt in form don't integrate with mailwizz. Is it possible I use gravity form or any other kind of form to integrate mailwizz and set it as opt in form in Divi?