Marco Almeida | Webdados on "[Plugin: WP Mail SMTP] "Gmail couldn't verify that propertoyou.com actually sent this message" Error"

With SSL and SMTP authentication active, I'm getting this error when sending to a gmail account.

The "From" email is exactly the same as the SMTP account used to send email.

Any ideas on how to avoid this?

https://wordpress.org/plugins/wp-mail-smtp/