SMTPDiagPro is a small diagnostic tool to test the configuration of a SMTP-Server including DNS MX.
I test it for example whether the DNS MX records are set correctly and if an Exchange server via SMTP from the Internet is properly accessible. So he accepts or rejects the right messages and the antivirus program works well.
You can save all settings to be able to repeat tests quickly.
* Don't need to install (portable app) * Read DNS MX and shows welcome message * Send Mail to a single host, the first DNS MX host or all DNS MX hosts * Save settings in profiles * Can have unlimited recipients or attachments * Auto-text for subject and body * Shows detailed information about the actions * Specify local hostname * Use Encryption with TLS and SSL * test hosts for begin blacklists using spamhaus.org * test hosts for begin open relays * Spam test option using GTUBE and keywords * Virus test option using EICAR * Test for TLS support * Test for SSL support