Feature Request: SMTP uptime

[cepheiVV]

Test if a connection to the SMTP Server is valid with the setup of the clients website;
$GLOBALS['TYPO3_CONF_VARS']['Mail']

Notify an Administrator if the connection is invalid.

@georgringer Do you think this feature can be implemented and is suitable for the general purpose of the t3monitoring extension?

[christophlehmann]

@cepheiVV Have you seen https://github.com/networkteam/sentry_client ? Basically it informs you when errors occur, also in mail transmission issues.