SMTP Class
Properties Methods Events Configuration Settings Errors
The SMTP Class is used to send Internet mail using the SMTP protocol (the Internet mail standard).
Syntax
class ipworksedi.SMTP
Remarks
The SMTP Class supports both plaintext and SSL/TLS connections (RFC 2487). When connecting over SSL/TLS the on_ssl_server_authentication event allows you to check the server identity and other security attributes. The on_ssl_status event provides information about the SSL handshake. Additional SSL related settings are also supported via the config method.
The SMTP Class 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 send_to, subject, from_, cc, b_cc, etc. that map directly to the internet mail message headers with the same name (RFC 822). The message text is set in message_text. Messages are sent by calling the send method.
The class supports message delivery to multiple recipients through the send_to, cc, and b_cc properties. Simply specify the destination email addresses separated by commas.
The interface of the class is open-ended. New features, including MIME attachments can be supported by using the other_headers property.
A number of events provide feedback during the operation of the class. The on_transfer event is fired during message delivery to show the number of bytes delivered. The on_pi_trail 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 class with short descriptions. Click on the links for further details.
| allow_extensions | A switch allowing the class to use ESMTP features (SMTP extensions). |
| auth_mechanism | Used when connecting to the mail server. |
| b_cc | 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 class is connected. |
| delivery_notification_to | Email address to which to send a delivery notification. |
| firewall_auto_detect | This property tells the class whether or not to automatically detect and use firewall system settings, if available. |
| firewall_type | This property determines the type of firewall to connect through. |
| firewall_host | This property contains the name or IP address of firewall (optional). |
| firewall_password | This property contains a password if authentication is to be used when connecting through the firewall. |
| firewall_port | This property contains the TCP port for the firewall Host . |
| firewall_user | This property contains a user name if authentication is to be used connecting through a firewall. |
| from_ | The email address of the sender (required). |
| idle | The current status of the class. |
| importance | Importance of the mail message (optional). |
| last_reply | The last reply from the server. |
| local_host | The name of the local host or user-assigned IP interface through which connections are initiated or accepted. |
| mail_port | The server port for SMTP (default 25). |
| mail_server | The name or address of a mail server (mail relay). |
| message | Provides a way to set the raw message content. |
| message_date | Date of the mail message (optional). |
| message_header_count | The number of records in the MessageHeader arrays. |
| message_header_field | This property contains the name of the HTTP header (same case as it is delivered). |
| message_header_value | This property contains the header contents. |
| message_headers_string | String representation of RFC822-encoded headers of the message. |
| message_id | The Message Identifier for the message. |
| message_recipient_count | The number of records in the MessageRecipient arrays. |
| message_recipient_address | This property contains the email address of the recipient. |
| message_recipient_name | This property contains name of the recipient. |
| message_recipient_options | This property contains the recipient sending options (used only by SMTP). |
| message_recipient_type | This property contains the recipient type: To, Cc, or BCc. |
| message_text | The full text of the message to send (without headers). |
| other_headers | An RFC 822 compliant string consisting of extra headers. |
| password | A password for logon to the MailServer . |
| priority | Priority of the mail message (optional). |
| read_receipt_to | Email address to send a read receipt to. |
| reply_to | A mail address to which to reply (optional). |
| return_path | Sets the Return-Path to be used for sending email. |
| send_to | A comma separated list of addresses for destinations (required). |
| sensitivity | Sensitivity of the mail message (optional). |
| ssl_accept_server_cert_encoded | The certificate (PEM/base64 encoded). |
| ssl_cert_encoded | The certificate (PEM/base64 encoded). |
| ssl_cert_store | The name of the certificate store for the client certificate. |
| ssl_cert_store_password | If the certificate store is of a type that requires a password, this property is used to specify that password in order to open the certificate store. |
| ssl_cert_store_type | The type of certificate store for this certificate. |
| ssl_cert_subject | The subject of the certificate used for client authentication. |
| ssl_enabled | Whether TLS/SSL is enabled. |
| ssl_server_cert_encoded | The certificate (PEM/base64 encoded). |
| ssl_start_mode | Determines how the class starts the SSL negotiation. |
| subject | The subject of the mail message (optional). |
| timeout | A timeout for the class. |
| user | A user identifier to login as in the MailServer . |
Method List
The following is the full list of the methods of the class 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. |
| do_events | Processes events from the internal message queue. |
| expand | Asks the MailServer to expand a name or mailing list. |
| interrupt | Interrupt the current method. |
| process_queue | Sends the messages which have previously been queued into QueueDir . |
| queue | Queues the message into QueueDir . |
| reset | Reset the class. |
| reset_headers | Resets all the message headers to empty. |
| send | Sends the current message. |
| send_to_terminal_and_email | Sends to terminal and email. |
| send_to_terminal_only | Sends to terminal only. |
| send_to_terminal_or_email | Sends to terminal or email. |
| verify | Sends a Verification request to the SMTP server. |
Event List
The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.
| on_connection_status | Fired to indicate changes in connection state. |
| on_end_transfer | Fired when the message text completes transferring. |
| on_error | Information about errors during data delivery. |
| on_expand | Fired for every email address returned by the server when the Expand method is called. |
| on_pi_trail | Traces the commands sent to the mail server, and the respective replies. |
| on_ssl_server_authentication | Fired after the server presents its certificate to the client. |
| on_ssl_status | Shows the progress of the secure connection. |
| on_start_transfer | Fired when the message text starts transferring. |
| on_transfer | Fired while the message text gets transferred to MailServer . |
Configuration Settings
The following is a list of configuration settings for the class 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). |
| MessageHeadersString | String representation of RFC822-encoded headers of the message. |
| MessageIdAlgorithm | Determines the algorithm used to hash the random MessageId. |
| 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. |
| StopOnBccErrors | Instructs the class to stop sending the message if the server does not acknowledge any of the BCCs. |
| StopOnCcErrors | Instructs the class to stop sending the message if the server does not acknowledge any of the CCs. |
| StopOnToErrors | Instructs the class to stop sending the message if the server does not acknowledge any of the TOs. |
| TransferText | The current portion of the message being sent. |
| ConnectionTimeout | Sets a separate timeout value for establishing a connection. |
| FirewallAutoDetect | Tells the class 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. |
| KeepAliveInterval | The retry interval, in milliseconds, to be used when a TCP keep-alive packet is sent and no response is received. |
| KeepAliveTime | The inactivity time in milliseconds before a TCP keep-alive packet is sent. |
| 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 port in the local host where the class binds. |
| MaxLineLength | The maximum amount of data to accumulate when no EOL is found. |
| MaxTransferRate | The transfer rate limit in bytes per second. |
| ProxyExceptionsList | A semicolon separated list of hosts and IPs to bypass when using a proxy. |
| TCPKeepAlive | Determines whether or not the keep alive socket option is enabled. |
| TcpNoDelay | Whether or not to delay when sending packets. |
| UseIPv6 | Whether to use IPv6. |
| LogSSLPackets | Controls whether SSL packets are logged when using the internal security API. |
| OpenSSLCADir | The path to a directory containing CA certificates. |
| OpenSSLCAFile | Name of the file containing the list of CA's trusted by your application. |
| OpenSSLCipherList | A string that controls the ciphers to be used by SSL. |
| OpenSSLPrngSeedData | The data to seed the pseudo random number generator (PRNG). |
| ReuseSSLSession | Determines if the SSL session is reused. |
| SSLCACertFilePaths | The paths to CA certificate files on Unix/Linux. |
| SSLCACerts | A newline separated list of CA certificate to use during SSL client authentication. |
| SSLCheckCRL | Whether to check the Certificate Revocation List for the server certificate. |
| SSLCipherStrength | The minimum cipher strength used for bulk encryption. |
| SSLEnabledCipherSuites | The cipher suite to be used in an SSL negotiation. |
| SSLEnabledProtocols | Used to enable/disable the supported security protocols. |
| SSLEnableRenegotiation | Whether the renegotiation_info SSL extension is supported. |
| SSLIncludeCertChain | Whether the entire certificate chain is included in the SSLServerAuthentication event. |
| SSLNegotiatedCipher | Returns the negotiated ciphersuite. |
| SSLNegotiatedCipherStrength | Returns the negotiated ciphersuite strength. |
| SSLNegotiatedCipherSuite | Returns the negotiated ciphersuite. |
| SSLNegotiatedKeyExchange | Returns the negotiated key exchange algorithm. |
| SSLNegotiatedKeyExchangeStrength | Returns the negotiated key exchange algorithm strength. |
| SSLNegotiatedVersion | Returns the negotiated protocol version. |
| SSLProvider | The name of the security provider to use. |
| SSLSecurityFlags | Flags that control certificate verification. |
| SSLServerCACerts | A newline separated list of CA certificate to use during SSL server certificate validation. |
| TLS12SignatureAlgorithms | Defines the allowed TLS 1.2 signature algorithms when UseInternalSecurityAPI is True. |
| TLS12SupportedGroups | The supported groups for ECC. |
| TLS13KeyShareGroups | The groups for which to pregenerate key shares. |
| TLS13SignatureAlgorithms | The allowed certificate signature algorithms. |
| TLS13SupportedGroups | The supported groups for (EC)DHE key exchange. |
| 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. |
| BuildInfo | Information about the product's build. |
| CodePage | The system code page used for Unicode to Multibyte translations. |
| LicenseInfo | Information about the current license. |
| ProcessIdleEvents | Whether the class uses its internal event loop to process events when the main thread is idle. |
| SelectWaitMillis | The length of time in milliseconds the class will wait when DoEvents is called if there are no events to process. |
| UseInternalSecurityAPI | Tells the class whether or not to use the system security libraries or an internal implementation. |