Alan,
Appreciate the code very much. Thanks for sharing it.
FYI, I tried using it with my SMTP provider (Rackspace) who requires SSL
and StartTLS. I kept getting an authorization error, login credentials
were refused.
After some Googling, I found a bit of info that I can't confirm as true,
but it does make sense as to why I can't get authorization to work with
Rackspace SMTP.
Rather than try to repeat what was explained, I'll just insert it here:
==============================
Your provider needs to support STARTTLS (explicit SSL), which works
originally over unencrypted ports like 25 and 587, if you want to use
the Send-MailMessage or System.Net.Mail classes. From the MSDN
documentation on these classes
(athttp://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient.enablessl(v=vs.110).aspx
<http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient.enablessl%28v=vs.110%29.aspx>)
:
TheSmtpClient
<http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient%28v=vs.110%29.aspx>class
only supports the SMTP Service Extension for Secure SMTP over Transport
Layer Security as defined in RFC 3207. In this mode, the SMTP session
begins on an unencrypted channel, then a STARTTLS command is issued by
the client to the server to switch to secure communication using SSL.
See RFC 3207 published by the Internet Engineering Task Force (IETF) for
more information.
An alternate connection method is where an SSL session is established up
front before any protocol commands are sent. This connection method is
sometimes called SMTP/SSL, SMTP over SSL, or SMTPS and by default uses
port 465. This alternate connection method using SSL is not currently
supported.
=======================================
Apparently, Rackspace, which requires port 465 for all SMTP
communications requires implicit SSL, not explicit SSL.
But, again, thanks for the code sample! I understand it works well with
Gmail.
Mike Copeland
Alan Bourke wrote:
For people having trouble with this, I have pasted the code into a Gist
instead, since I can't be bothered formatting it to fit the Fox Wiki
code tags, learning the markup for that etc. So try re-getting it from
here:
https://gist.github.com/anonymous/77919191364228819b6e
Note that in terms of sending some services are touchy about the 'from'
address. Office 365 online for example won't work unless the 'from'
address exactly matches the SMTP login name.
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