SMTP Component
Properties Methods Events Configuration Settings Errors
The SMTP Component is used to send Internet mail using the SMTP protocol (the Internet mail standard).
Syntax
nsoftware.IPWorks.Smtp
Remarks
The SMTP Component implements a standard SMTP client as specified in RFC 821. It has a simple plug-and-play interface. It contains a number of properties like SendTo, Subject, From, Cc, BCc, etc. that map directly to the internet mail message headers with the same name (RFC 822). The message text is set in MessageText. Messages are sent by calling the Send method.
The component supports message delivery to multiple recipients through the SendTo, Cc, and BCc properties. Simply specify the destination email addresses separated by commas.
The interface of the component is open-ended. New features, including MIME attachments can be supported by using the OtherHeaders property.
A number of events provide feedback during the operation of the component. The Transfer event is fired during message delivery to show the number of bytes delivered. The PITrail event traces the commands that are sent to the server and the respective replies.
Property List
The following is the full list of the properties of the component with short descriptions. Click on the links for further details.
| AllowExtensions | A switch allowing the component to use ESMTP features (SMTP extensions). |
| AuthMechanism | Used when connecting to the mail server. |
| BCc | A comma separated list of addresses for blind carbon copies (optional). |
| Cc | A comma separated list of addresses for carbon copies (optional). |
| Command | Used to send additional commands directly to the server. |
| Connected | Shows whether the component is connected. |
| DeliveryNotificationTo | Email address to send to which to send a delivery notification. |
| Firewall | A set of properties related to firewall access. |
| From | The email address of the sender (required). |
| Idle | The current status of the component. |
| Importance | Importance of the mail message (optional). |
| LastReply | The last reply from the server. |
| LocalHost | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
| MailPort | The server port for SMTP (default 25). |
| MailServer | The name or address of a mail server (mail relay). |
| Message | Provides a way to set the raw message content. |
| MessageDate | Date of the mail message (optional). |
| MessageHeaders | Collection of RFC822-encoded headers of the message. |
| MessageHeadersString | String representation of RFC822-encoded headers of the message. |
| MessageId | The Message Identifier for the message. |
| MessageRecipients | The collection of recipients of the message. |
| MessageText | The full text of the message to send (without headers). |
| OtherHeaders | An RFC 822 compliant string consisting of extra headers. |
| Password | A password for logon to the MailServer . |
| Priority | Priority of the mail message (optional). |
| ReadReceiptTo | Email address to send a read receipt to. |
| ReplyTo | A mail address to which to reply (optional). |
| ReturnPath | Sets the Return-Path to be used for sending email. |
| SendTo | A comma separated list of addresses for destinations (required). |
| Sensitivity | Sensitivity of the mail message (optional). |
| Subject | The subject of the mail message (optional). |
| Timeout | A timeout for the component. |
| User | A user identifier to login as in the MailServer . |
Method List
The following is the full list of the methods of the component with short descriptions. Click on the links for further details.
| Config | Sets or retrieves a configuration setting . |
| Connect | Connects to the mail relay and sends the SMTP HELO command. |
| Disconnect | Disconnects from the SMTP server. |
| DoEvents | Processes events from the internal message queue. |
| Expand | Asks the MailServer to expand a name or mailing list. |
| Interrupt | Interrupt the current method. |
| ProcessQueue | Sends the messages which have previously been queued into QueueDir . |
| Queue | Queues the message into QueueDir . |
| ResetHeaders | Resets all the message headers to empty. |
| Send | Sends the current message. |
| SendToTerminalAndEmail | Sends to terminal and email. |
| SendToTerminalOnly | Sends to terminal only. |
| SendToTerminalOrEmail | Sends to terminal or email. |
| SetMessageStream | Sets the stream to be uploaded to the server as part of the message. |
| Verify | Sends a Verification request to the SMTP server. |
Event List
The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.
| ConnectionStatus | Fired to indicate changes in connection state. |
| EndTransfer | Fired when the message text completes transferring. |
| Error | Information about errors during data delivery. |
| Expand | Fired for every email address returned by the server when the Expand method is called. |
| PITrail | Traces the commands sent to the mail server, and the respective replies. |
| StartTransfer | Fired when the message text starts transferring. |
| Transfer | Fired while the message text gets transferred to MailServer . |
Configuration Settings
The following is a list of configuration settings for the component with short descriptions. Click on the links for further details.
| AllowEmptyTo | If set to True, then the SendTo property is not required. |
| AuthorizationIdentity | The value to use as the authorization identity when SASL authentication is used. |
| Charset | When set, the message headers will be encoded using the specified Charset. |
| Hello | The argument for HELO (herald) command to the server (defaults to local host name). |
| KeepQueue | If set to True, queued files are not deleted after a successful send. |
| MaxHeaderLength | Maximum length for headers to avoid line folding (default 80). |
| OtherHeaders | An RFC 822 compliant string consisting of extra headers. |
| ReturnPath | Sets the Return-Path to be used for sending email. |
| SendRSET | Whether to send RSET command. |
| StopOnToErrors | Instructs the component to stop sending the message if the server does not acknowledge any of the TOs. |
| StopOnCcErrors | Instructs the component to stop sending the message if the server does not acknowledge any of the CCs. |
| StopOnBccErrors | Instructs the component to stop sending the message if the server does not acknowledge any of the BCCs. |
| ConnectionTimeout | Sets a separate timeout value for establishing a connection. |
| FirewallAutoDetect | Tells the component whether or not to automatically detect and use firewall system settings, if available. |
| FirewallHost | Name or IP address of firewall (optional). |
| FirewallPassword | Password to be used if authentication is to be used when connecting through the firewall. |
| FirewallPort | The TCP port for the FirewallHost;. |
| FirewallType | Determines the type of firewall to connect through. |
| FirewallUser | A user name if authentication is to be used connecting through a firewall. |
| KeepAliveTime | The inactivity time in milliseconds before a TCP keep-alive packet is sent. |
| KeepAliveInterval | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. |
| Linger | When set to True, connections are terminated gracefully. |
| LingerTime | Time in seconds to have the connection linger. |
| LocalHost | The name of the local host through which connections are initiated or accepted. |
| LocalPort | The TCP port in the local host where the component binds. |
| MaxLineLength | The maximum amount of data to accumulate when no EOL is found. |
| MaxTransferRate | The transfer rate limit in bytes per second. |
| RecordLength | The length of received data records. |
| TCPKeepAlive | Determines whether or not the keep alive socket option is enabled. |
| UseIPv6 | Whether to use IPv6. |
| TcpNoDelay | Whether or not to delay when sending packets. |
| AbsoluteTimeout | Determines whether timeouts are inactivity timeouts or absolute timeouts. |
| FirewallData | Used to send extra data to the firewall. |
| InBufferSize | The size in bytes of the incoming queue of the socket. |
| OutBufferSize | The size in bytes of the outgoing queue of the socket. |
| CodePage | The system code page used for Unicode to Multibyte translations. |