The following WordPress PHP function will automatically add the Sender email header to outgoing emails. This can help with deliverability by giving the email more information that spam filters use…

The following WordPress PHP function will automatically add the plain text alternative source to outgoing emails. This provides a non-HTML formatted version of the email, which is sometimes preferred by…

When sending emails meta-data in the email "header" explains who sent the email. There are two similar, but quite different, details that when not set correctly can make your emails…

By default WordPress will send emails as plain text using the content type "text/plain". But some plugins, such as Gravity Forms, will send HTML emails. The issue with this is…