Electronic mail authentication and similar concepts like DMARC, SPF, DKIM, BIMI, MTA-STS, TLS-RPT, RUA, RUF, plus the comparison among AntiSpam and DMARC, as well as the idea of DMARC Alignment, are very important in understanding how e mail security and integrity are managed. Here is an summary of every time period:E-mail Authentication: This is t