Visual FoxPro

Verify Connectivity to the SMTP Server

Demonstrates the Chilkat MailMan.VerifySmtpConnection method, which tests whether a TCP/IP connection can be established with the configured SMTP server. It verifies connectivity only — it does not authenticate. This example configures the SMTP host and checks whether it can be reached.

Background: When a send fails, it helps to know where it broke. VerifySmtpConnection isolates the first hop — can the client even reach the server on the configured host and port, and complete the TLS handshake? A failure here points at networking, firewall, DNS, port, or certificate issues rather than credentials. Once connectivity is confirmed, VerifySmtpLogin tests the authentication step.

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LOCAL loMailman
LOCAL lnConnected

*  Demonstrates the MailMan.VerifySmtpConnection method, which tests whether a TCP/IP
*  connection can be established with the configured SMTP server.  It verifies connectivity
*  only (it does not authenticate).

loMailman = CreateObject('Chilkat.MailMan')

*  Configure the SMTP server connection.
loMailman.SmtpHost = "smtp.example.com"
loMailman.SmtpPort = 465
loMailman.SmtpSsl = 1

*  Test connectivity to the SMTP server.
lnConnected = loMailman.VerifySmtpConnection()

IF (lnConnected = 1) THEN
    ? "Successfully connected to the SMTP server."
ELSE
    ? "Could not connect to the SMTP server."
ENDIF

RELEASE loMailman