Understand different email protocols for secure and efficient communication.
Email Protocols
Infomaniak SMTP, IMAP & POP3 Settings (2026): Swiss Privacy Hosting with App Passwords
Complete Infomaniak email settings including the dedicated application password step, Swiss data center context, DANE encryption, and kMail/kSuite tier differences.
Scarlet.be SMTP, IMAP & POP3 Settings (2026): Proximus’s Belgian Budget ISP
Complete Scarlet.be email settings with the critical mailmanager IMAP activation step, dual SMTP hostnames for home and roaming use, and Proximus subsidiary context.
home.pl SMTP, IMAP & POP3 Settings (2026): Poland’s Largest Hosting Provider
Complete home.pl email settings for Poland's largest hosting provider, with the critical detail on the per-account server hostname that catches most new users.
Telenor.dk SMTP, IMAP & POP3 Settings (2026): Danish ISP Legacy Domains
Complete Telenor.dk email settings reveal secure POP3, IMAP, and SMTP configurations that cover every legacy Danish ISP domain absorbed by Telenor Denmark.
Sunrise.ch SMTP, IMAP & POP3 Settings (2026): Swiss Independent Telecom
Complete Sunrise.ch email settings for Switzerland's independent telecom, covering the smtp2 hostname gotcha, freesurf.ch legacy addresses, and UPC/Cablecom migration context.
RFC 974: Mail Routing and the Domain System (obsoleted by RFC 5321)
Groundbreaking at its time, RFC 974 revolutionized mail routing with DNS integration, but what crucial updates led to its obsolescence by RFC 5321?
RFC 5524: Extended URLFETCH for Binary and Converted Parts
Extends IMAP URLFETCH to support binary and format-converted part retrieval.
RFC 3464: An Extensible Message Format for Delivery Status Notifications
Defines the machine-readable DSN format used in bounce messages and delivery receipts.
RFC 6522: The Multipart/Report Media Type
Defines the multipart/report MIME type used to structure delivery status notifications and other administrative messages.
RFC 2142: Mailbox Names for Common Services, Roles and Functions
Defines standard role mailboxes every domain should maintain: postmaster@, abuse@, hostmaster@, etc.
