What is alert 8101?


GMS Secure Socket Layer has returned an error to the remote server’s VRFY command because GMS has been configured to only accept messages encrypted by the secure socket layer (SSL ) from this remote system. No communication between the remote server/client and GMS will be possible until the remote server correctly negotiates a secure connection. GMS uses the standard secure transport specified in RFC2487 to ensure compatibility with other messaging servers.

In this case, session Undefined is processing a connection from Undefined. The remote server gave the SMTP command


GMS rejected the command with

530 Must issue a STARTTLS command first.

To resolve this problem, make sure that

  • GMS has the correct certificate installed;
  • the remote server or client conforms to the SSL or STARTTLS standard; and
  • the remote server or client is correctly configured.

See Also:

Keywords:STARTTLS SSL VRFY RFC2487 encryption security anti-snooping secure 8101

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