POP3 Fields
| Protocol Field | pcre Writing Method | Field Type | Field Description | | :------------------------- | :-------- | :------- | ------------------------------------------------------------ | | pop3_greeting | GREET | Character string | First response of the server, including the server software and version information | | pop3_user | USER | Character string | USER command parameter | | pop3_user_len | / | Length | USER command parameter length | | pop3_pass | PASS | Character string | PASS command parameter | | pop3_pass_len | / | Length | PASS command parameter length | | pop3_head_content_type | HEAD_CT | Character string | **content-type** value in the email message header and MIME entity header | | pop3_head_content_type_len | / | Length | Length of the **content-type** value in the email message header and MIME entity header | | pop3_head_date | HEAD_DATE | Character string | Value of **date** the email message header | | pop3_head_date_len | / | Length | Length of the **date** value in the email message header | | pop3_cd_filename | CD_FNAME | Character string | Attachment name identified by **content-disposition filename** in the email message header and MIME entity header | | pop3_cd_filename_len | / | Length | Length of the attachment name identified by **content-disposition filename** in the email message header and MIME entity header |