STARTTLS
STARTTLS
olemus
tekstiedastusprotokollide standardlaiend,
võimaldab luua krüpteeritud ühenduse
otse TCP-ühenduse peal,
kasutamata selleks eraldi porti
ülevaateid
https://www.mimecast.com/blog/ssl-vs-tls-vs-starttls-encryption/
https://en.wikipedia.org/wiki/Opportunistic_TLS
http://etutorials.org/Server+Administration/Sendmail/Part+II+Administration/Chapter+10.+Maintain+Security+with+sendmail/10.10+STARTTLS/
https://certified-senders.org/wp-content/uploads/2020/02/Email-Transport-Encryption-STARTTLS-vs.-DANE-vs.-MTA-STS_updated.pdf
https://www.usenix.org/system/files/sec21-poddebniak.pdf
standardid
IMAP, POP3 -- https://www.ietf.org/rfc/rfc2595.txt
SMTP -- https://www.ietf.org/rfc/rfc3207.txt
FTP -- https://tools.ietf.org/html/rfc4217
XMPP -- https://tools.ietf.org/html/rfc6120
LDAP -- https://www.ietf.org/rfc/rfc2830.txt
NNTP -- https://tools.ietf.org/html/rfc4642