Email tools

Each title links to where the respective tool is explained.

Lookups

Configuration database

SRV records

MX records

SPF record

DKIM record

DMARC record

BIMI record

TLSA records

MTA-STS policy

TLS Reporting record

SMIMEA records

OPENPGPKEY records

Protocols

ESMTP

Examples:

• text/enriched
• text/html with inline CSS
• text/html with internal CSS
• multipart/mixed
• multipart/mixed with content disposition
• multipart/mixed with preamble and epilogue
• multipart/alternative
• multipart/related with content ID

Email tracking

POP3

IMAP

Sieve

ManageSieve

Encodings

Quoted-Printable encoding

Base64 encoding

Percent encoding

Encoded-Word encoding

Punycode encoding

Extended-Parameter encoding

Examples:

• Filename
• Continuation
• Ordering
• Combined

Various

Hash function

Unicode normalization

Unix time conversion