Using Office 365 as a mail relay with Exim on Debian
Recently I had to setup a web server to relay all outbound email (e.g. password resets) through Office 365. The options are listed in How to set up a multifunction…
Opening winmail.dat files from Outlook attachments
Occasionally I receive emails from people which have a single attachment named winmail.dat. After a bit of searching online, it turns out that Microsoft Outlook, depending on how it is…
Checking SPF on incoming mail with Postfix
Something I've been wanting to add to my mail server for a while is Sender Policy Framework (SPF) checking on incoming mail. For anyone who isn't familiar with SPF, it…