Hi all,

Please let me know if there is a way to test for proper SMTP server connectivity using libcurl 'without actually sending an email'.
Although this could otherwise be done with a simple telnet EHLO (or HELO), I would like to know if it can be accomplished using the libcurl API(s).

My presumption was that, after setting up the SMTP server URL (using CURLOPT_URL), attempting just a 'FROM' alone (using CURLOPT_MAIL_FROM) would suffice.
However, doing so sort of causes the code to get stalled (and then, eventually time out), probably because the library is expecting the 'RCPT' and/or 'DATA' values too, in order to round up on the easy_perform.

When tried with the attached sample code, (with curl v7.23.1), I do observe the salutations come from the SMTP server on the other end, which then verifies the sender address with a 250 OK,
but just stalls after that.

Appreciate if any of you could throw some light on how I could possibly go about it. Thanks in advance.

Regards,
Naveen

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