Secure/Multipurpose Internet Mail Extensions (S/MIME)
Secure/Multipurpose Internet Mail Extensions (S/MIME)
- April 23, 2021
- Posted by: Nicola Selenu

The standard for public key encryption and signing of MIME data. An SMTP server to route email to an intermediate mail server rather than directly to the recipient’s server.
Author:Nicola Selenu
Email Service Providers Handbook
The most comprehensive “Handbook of Email Service Providers“!
SPAMASSASSIN RULES
All SpamAssassin rules in one place, EXPLAINED!
SMTP COMMANDS
& REPLY CODES
All SMTP/ESMTP commands and reply codes in one place, EXPLAINED!
Free DNS Tool
Check the DNS records of your domain with our free DNS tool.
Deliverability Glossary
The most comprehensive Email Deliverability and Marketing Glossary!
Secure/Multipurpose Internet Mail Extensions (S/MIME)
Secure/Multipurpose Internet Mail Extensions (S/MIME)
- April 23, 2021
- Posted by: Nicola Selenu



The standard for public key encryption and signing of MIME data. An SMTP server to route email to an intermediate mail server rather than directly to the recipient’s server.
« Back to Glossary IndexAuthor:Nicola Selenu
Email Service Providers Handbook
The most comprehensive “Handbook of Email Service Providers“!
SPAMASSASSIN RULES
All SpamAssassin rules in one place, EXPLAINED!
SMTP COMMANDS
& REPLY CODES
All SMTP/ESMTP commands and reply codes in one place, EXPLAINED!
Free DNS Tool
Check the DNS records of your domain with our free DNS tool.
Deliverability Glossary
The most comprehensive Email Deliverability and Marketing Glossary!
« Back to Glossary Index