The MailingStruct defines a mailing.
| Name | Type | Description | 
| AdditionalHeaders | string | Any addtional headers (e.g., X-type headers) | 
| Attachments | string | Any attachments. The syntax for using this element is: 
 'Attachments' => '{foo 2003 times.txt}' 
 where times.txt is the name of the attached file, and 2003 is the value for 'uniqueid_' in the 'docparts_' table. "Foo" is simply a placeholder and can be replaced with any string you choose. Note that both the quotes and the curly brackets are significant. Using 'foo 2003 times.txt' instead of '{foo 2003 times.txt}' will cause the SOAP server to reply with an error. | 
| BypassModeration | boolean | If true, the mailing may bypass moderation | 
| Campaign | string | What campaign the mailing should belong to | 
| CharSetID | int | The ID of the charset for this mailing (from CharSetStruct) | 
| DetectHtml | boolean | If true, the mailing should detect if the recipient has the ability to read HTML | 
| DontAttemptAfterDate | dateTime | The "kill date" after which this mailing should no longer be delivered | 
| EnableRecency | boolean | If true, recency checking should be done for this mailing | 
| From | string | The header "From:" | 
| HtmlMessage | string | The HTML portion of the mailing | 
| HtmlSectionEncoding | int | The HTML message encoding | 
| IsHtmlSectionEncoded | boolean | If true, the HTML portion of the mailing has been encoded | 
| IsTextSectionEncoded | boolean | If true, the text portion of the mailing has been encoded | 
| ListName | string | The list this mailing is posted to | 
| RecencyNumberOfMailings | int | If enabled, the number of mailings that should trigger recency limits. | 
| RecencyWhich | string | When checking for recency, should the number of mailings be more than, equal to or less than the number in RecencyNumberof Mailings (from RecencyWhichEnum) | 
| ReplyTo | string | The "Reply To:" header | 
| ResendAfterDays | int | If set, means that when the message is approved, it should be resubmitted for automatic approval after so many days | 
| SampleSize | int | The maximum number of recipients to receive this mailing. If not set, there is no maximum | 
| ScheduledMailingDate | dateTime | The date and time the mailing is scheduled to be sent | 
| Subject | string | The "Subject:" header | 
| TextMessage | string | The text portion of the mailing | 
| TextSectionEncoding | int | The encoding of the text section | 
| Title | string | The title of the mailing | 
| To | string | The "To:" header | 
| TrackOpens | boolean | If true, this mailing should detect if recipients open it | 
| RewriteDateWhenSent | boolean | If true, the mailing should have its "Date:" header rewritten to be the time it was actually sent, removing the original "Date:" header | 
NOTES
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