Configuring Clients

Any programs that you want to send mail to smtp4dev need to be configured so that they send mail via SMTP to the host/address and port number where smtp4dev is running.

Look for the following options in your program/platform

Option	Value
SMTP hostname	localhost if client is on same machine as smtp4dev or the DNS name of the machine where smtp4dev is running e.g. mymachine.mydomain.
SMTP port number	25 (or the port you have chosen for SMTP server in smtp4dev)
SSL/TLS, Secure connection, Encryption	Off or Not required etc TLS is supported by SMTP4DEV if your client insists, but must be turned on. See configuration section.
Authentication	Off. See below.
Username/Password	Empty Authentication is not required, but by default will be accepted with any credentials if your client insists on this (can be turned off using the Allow any credentials (SMTP) option). Alternatively you can turn on the Require Authentication (SMTP) option in the smtp4dev options and set up a user in the Users section, then use the username password you set up here.

This is valid for the default configuration for smtp4dev. See configuration information for information on how to check and change this including how to enable SSL/TLS.