PowerShell

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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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

#  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).

$mailman = New-Object Chilkat.MailMan

#  Configure the SMTP server connection.
$mailman.SmtpHost = "smtp.example.com"
$mailman.SmtpPort = 465
$mailman.SmtpSsl = $true

#  Test connectivity to the SMTP server.
$connected = $mailman.VerifySmtpConnection()

if ($connected -eq $true) {
    $("Successfully connected to the SMTP server.")
}
else {
    $("Could not connect to the SMTP server.")
}