SMTP Authentication and SMTP Using TLS / SSL for Inbound Mails (System Type AS ABAP)

Applies to Parameter: icm/server_port_<xx> (AS ABAP)

You have already set the protocol (PROT) to be used in parameter icm/server_port_<xx> to SMTP, and specified the port (PORT) to be used, and now you want to configure SMTP authentication and/or SMTP settings with TLS / SSL for inbound mails.

SMTP-specific configuration options are described below:

TLS: Configures SMTP using TLS / SSL
AUTHMECHANISM: Authenticates inbound mails
AUTHUSERS: Defines authorized AS ABAP users

Example

Below are two examples of the possible configuration:

Example A:icm/server_port_1 = PROT=SMTP, PORT=25000, TLS=2

Opens port 25000 for SMTP requests, and requests the client to encrypt with TLS. If this is not possible, the connection is cancelled.
Example B:icm/server_port_1 = PROT=SMTP, PORT=25000, TLS=2, AUTHMECHANISMS=PLAIN; EXTERNAL, AUTHUSERS=ABAPUser1; ABAPUser2

Opens port 25000 for SMTP requests, and requests the client to encrypt with TLS. If this is not possible, the connection is cancelled. The client must authenticate itself either with user/password or client certificate. ABAPUser1 and ABAPUser2 are entered as authorized users.

The character string has the following syntax:

PROT= <SMTP>, PORT= <port or service name>[, TIMEOUT= <timeout>, PROCTIMEOUT= <proctimeout>, EXTBIND=1, HOST= <host name>, SSLCONFIG=ssl_config_ <xx>, VCLIENT= <SSL client verification>, ACLFILE= <ACL file>, TLS= <SMTP TLS use>, AUTHMECHANISMS= <SMTP authentication>, AUTHUSERS= <SMTP user authentication>]

Configuration

TLS: Configure SMTP using TLS / SSL

0: No TLS request takes place.
1: The server asks the client to encrypt with TLS. If this is not possible, the connection is accepted using SMTP without TLS.
2: The client must encrypt with TLS; if not, the connection is cancelled.

AUTHMECHANISMS: Authentication for inbound mails

PLAIN: Authentication requires user/password
EXTERNAL: Authentication is done using a client certificate
NONE: No authentication requested

(Internet standard RFC 4422 describes SMTP authentication in detail.)

AUTHUSERS: Defines authorized users

The AUTHUSERS option specifies the users authorized for SMTP authentication. Standard AS ABAP users in client 000, user type SYSTEM, are used for SMTP authentication.

In the AUTHUSERS option you have to specify at least one user and a maximum of ten users is permitted. Users are separated in the character string by a semicolon; see Example B.