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# Mail Options

Mail options can be any header supported by the server.

The mail data includes memo header items. These can be changed or added with entries in the MailOptions section. For example:

Data Header | Example | Comment
--- | --- | ---
From | "From: some@mail.com" | If not entered, the header is generated based on the information from the smtp_logon
Boundary | "Boundary: ––abcdf––" | The boundary string between data sections. If not entered, a string is generated automatically.

Examples of other header options:

Header name | Purpose
--- | ---
Abuse–Reports–To | Mailbox for reporting abuse
Apparently–To | Envelope recipients inserted my MTA
Approved–By | Mailing list moderator who has approved message
Content–Alias | Alternative to Content–Location URI
Content–Class | Hierarchical content classification
Content–Conversion | Variant of 'Conversion:'
Content–Length | Size in bytes of body part
Content–SGML–Entity | SGML entity information
Delivered–To | Message loop detection
Envelope–To | Mail envelope recipient
Errors–To | Address for notifications to be sent
Fax | Fax number of the originator
Fcc | File for copy of message
For–Approval | Recipients for approval of this message
For–Comment | Recipients for comment on this message
For–Handling | Primary recipients for handling this message
List–Digest | URL for mailing list digest subscription
List–Software | Mailing list software information
List–URL | URL for mailing list information
Mailer | Information about originating client software
Mailing–List | Mailing list information
Mail–System–Version | Information about originating client software
Message–Context | Type or context of message
Originating–Client | Information about originating client software
Originator–Info | Originator authentication information
Phone | Phone number of the originator.
Posted–To | Newsgroup to which message was sent
Precedence | Message precedence indicator
Read–Receipt–To | Address for notifications to be sent
Register–Mail–Reply–Requested–By | Address for notifications to be sent
Return–Receipt–Requested | Address for notifications to be sent
Return–Receipt–To | Address for notifications to be sent
Speech–Act | Speech act categorization of message
Status | Message status in delivery system
Telefax | Fax number of the originator
Translated–By | Mailbox of translator
Translation–Of | Reference source of translation
User–Agent | Information about originating client software
X–Admin | Submission server administrator mailbox
X–Complaints–To | Mailbox for reporting abuse
X–Confirm–reading–to | Address for notifications to be sent
X–Envelope–From | Mail envelope sender
X–Envelope–To | Mail envelope recipient
X–Face | Picture of the sender
X–IMAP | IMAP UID
X–List–Host | List server software information
X–Listserver | List server software information
X–Loop | Message loop detection
X–Mailer | Information about originating client software
X–Mailing–List | Mailing list information
X–MIME–Autoconverted | In–transit message conversion information
X–MimeOLE | Information about originating client software
X–MSMail–Priority | Yet another priority indication.
X–Newsreader | Information about originating client software
X–No–Archive | Do not archive publicly
X–OriginalArrivalTime | Time message was submitted
X–Priority | Message priority
X–RCPT–TO | Mail envelope recipient
X–Report–Abuse–To | Mailbox for reporting abuse
X–Sender | Tentative message sender
X–UIDL | Message identifier within mailstore
X–URI | URI of body part content
X–URL | Location of body part content
X–X–Sender | Extra–tentative message sender

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