Category:Email authentication
{{Cat main|E-mail authentication}}
{{Cat see also|Spamming}}
| ASRG | Anti-Spam Research Group
| PRA | Purported Responsible Address Sender ID |
| BATV | Bounce Address Tag Validation
| SPF | Sender Policy Framework |
| DKIM | DomainKeys Identified Mail
| SRS | Sender Rewriting Scheme |
| DSN | Delivery Status Notification bounce
| SMTP | Simple Mail Transfer Protocol |
| MARID | MTA Authorization Records In DNS
| colspan="2" | SMTP AUTH ESMTPA authentication | |
| PGP | Pretty Good Privacy
| S/MIME | Secure / MIME |