The `adkim` tag specifies the DKIM alignment mode, while the `aspf` tag specifies the SPF alignment mode. 1) adkim: Defines DKIM alignment as strict (`s`) or relaxed (`r`). Strict alignment requires an exact match between the domain in the DKIM signature and the From address, while relaxed alignment allows subdomain matches. 2) aspf: Defines SPF alignment as strict (`s`) or relaxed (`r`). Strict alignment requires an exact match between the domain in the SPF record and the From address, while relaxed alignment allows subdomain matches.