WordPress sends all mail from root@localhost using wp_mail()

@jtittle

Hmm I dont think that will work as I’ve implemented an alternate but similar plugin and added the necessary filters to functions.php to over ride the sender and it still doesnt work.

@Baadier

Are you using a WordPress plugin to integrate with a third-party solution, such as WP Mail SMTP?

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

By default, WordPress relies on PHP’s built-in mail() function which, without a valid and working mail server, will ultimately result in e-mails sent from WordPress landing in the SPAM/Junk folder. You can get around this by using a plugin, such as the one referenced about, that will allow you to integrate with third-party solutions such as Google Gmail, Mailgun, SendGrid, and others.

I’ve used this plugin in the past and it’s always worked without any issues, so long as the connection details that are provided to it are correct.

@jtittle

I tried using WP Mail SMTP and using SparkPost which is what I’m using but nothing seems to stop WordPress from using root@locahost as the sender address.

Because the sender address fails validation the mail gets rejected by wp_mail()