Why emails land in spam, what open rates still say today and how inactive contacts do harm to everyone else.
When a contact counts as inactive, what a reactivation looks like that does not read as desperation, and when deleting is required.
Why the open rate has measured little since automatic image preloading, and what actually decides whether a message gets opened.
SPF, DKIM and DMARC explained plainly: what the three records do, the order to set them up in, and why emails still fail to arrive when they are in place.
