SPF
TL;DR: Sender Policy Framework (SPF) is like a bouncer at a club, checking IDs to make sure only authorized people get in. When an email is sent, SPF allows the receiving mail...
SSO (Single Sign On)
TL;DR: Single sign-on (SSO) is like having a master key that unlocks multiple doors. Instead of remembering different keys (passwords) for each door (application or website), you...