People using advanced filtering may need to change their filters based
on changes soon to occur to FastMail.FM headers. If you are an advanced
user of FastMail.FM filters, you should read this forum
Thanks for reading the FastMail Blog: news, views and the occasional rant from the FastMail team. Want to keep up to date? Subscribe to our RSS feed, or sign up below and weʼll email you every time we post something new.