August 30, 2013

Email “Received” Headers

When an email is sent, it should contain no “Received” header fields. Each time the email is processed by a mail server along the delivery route, a new Received header field is prepended to the email. The very first Received header is added by the SMTP server that the SMTP client (such as your app or a program such as […]

Uncategorized 0 49 sec read
November 4, 2008

POP3 Headers and Attachment Info

The POP3 protocol is not very feature rich. To download an email “header” the POP3 client must issue a “TOP” command. The following text is from RFC 1939 and describes the response to the TOP command: … After the initial +OK, the POP3 server sends the headers of the message, the blank line separating the headers from the body, and […]

Uncategorized 0 3 min read

Tags

ActiveX asp async asynchronous C# callbacks Delphi email Encryption error messages events exchange server FTP GMail HTTP IMAP IOS Java Linking MIME oauth2 Office365 pfx PHP pop3 port-forwarding regsvr32 release notes RSA SFTP smartcard SMTP socket SSH SSL TLS tunnel upload vb6 VBScript VC++ x64 xades XML zip