Hi Sean,

Just a quick response as I'm about to leave work... and realised that I've not responded to your query yet - soory - not been too active on the mailing list recently :(

Were you trying to issue a VRFY command to the server or to send an email?

Also, can I please clarify if you were using curl or libcurl?

Cheers

Steve

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** [bugs:#1389] SMTP VRFY issued even when server doesn't support**
**Status:** open
**Created:** Tue Jul 01, 2014 11:56 AM UTC by Sean Atkinson
**Last Updated:** Thu Jul 03, 2014 02:56 AM UTC
**Owner:** Steve Holme
Seems that in curl 7.37 the VRFY SMTP command fails even when a server (such as sendgrid) doesn't list support for it. Verbose output below running on rhel 6.5 linux, suspect this applies since VRFY was introduced in 7.34 too.
* Rebuilt URL to: smtp://smtp.sendgrid.net:587/
* Hostname was NOT found in DNS cache
*   Trying 5.153.47.202...
* Connected to smtp.sendgrid.net (5.153.47.202) port 587 (#0)
< 220 ismtpd-023.ams1.sendgrid.net ESMTP service ready
> EHLO 23
< 250-83.140.21.74
< 250-8BITMIME
< 250-SIZE 20480000
< 250-AUTH=PLAIN LOGIN
< 250-AUTH PLAIN LOGIN
< 250 STARTTLS
> STARTTLS
< 220 Begin TLS negotiation now
* successfully set certificate verify locations:
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using TLSv1.2 / DHE-RSA-AES256-GCM-SHA384
* Server certificate:
* 	 subject: OU=Domain Control Validated; CN=*.smtp.sendgrid.net
* 	 start date: 2014-04-09 23:10:05 GMT
* 	 expire date: 2016-03-28 18:01:05 GMT
* 	 issuer: C=US; ST=Arizona; L=Scottsdale; O=GoDaddy.com, Inc.; OU=http://certs.godaddy.com/repository/; CN=Go Daddy Secure Certificate Authority - G2
* 	 SSL certificate verify ok.
> EHLO 23
< 250-83.140.21.74
< 250-8BITMIME
< 250-SIZE 20480000
< 250-AUTH=PLAIN LOGIN
< 250 AUTH PLAIN LOGIN
> AUTH LOGIN
< 334 VXNlcm5hbWU6
> ZnIyNA==
< 334 UGFzc3dvcmQ6
> amFMYWkzRWN1YTZ1
< 235 Authentication successful.
> VRFY sean_at_fr24.com
< 500 Command not implemented
* Command failed: 500
> QUIT
< 221 See you later
* Closing connection 0
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