Setting up Stash to use your SMTP mail server:

To configure a mail server for Stash, go to the administration area and click Mail server (under 'Settings'). See Supported platforms for the mail clients supported by Stash.

Fill in the form and click Save.

ホスト名The hostname of the mail server (for example "localhost" or "192.168.1.15").
ポートThe port of the mail server (if unspecified, the port 25 will be used).
ユーザ名The username to use to connect to the mail server.
パスワードThe password to use to connect to the mail server.
TLS を使用Check if the SMTP server you are connecting to uses TLS.
メールの差出人Specifies the 'From' header in notification emails (for example: noreply@yourcompany.com).

If you are looking to setup the outgoing mail server as an anonymous user, simply leave the username and password fields empty. In Chrome, these fields could be auto-populated, leading to an error.  Try with another browser to help workaround it.