Using TLS - how do you know if your isp or mail host requires this?

[wade at wadesmart.com]

10242006 0739 GMT-6

SO I typed in mail.wadesmart.com and then type capa and I receive -ERR
authorization first.
My provider doesnt provide IMAP.

wade

> -------- Original Message --------
> Subject: RE: Using TLS - how do you know if your isp or mail host
> requires this?
> From: Derek Broughton <news at pointerstop.ca>
> Date: Tue, October 24, 2006 7:27 am
> To: ubuntu-users at lists.ubuntu.com
>
> wade at wadesmart.com wrote:
>
> > 10232006 1306 GMT-6
> >
> > Ok. That is what I wanted to know. Thank you very much.
> >
> >> You mean cleartext instead of encrypted, right? POP3 is a cleartext
> >> protocol, much like HTTP or IMAP, and thus, credentials are sent
> >> always in the clear.
>
> Somebody broke the thread here, so I don't know what the original question
> was.  However, I have to disagree with you.  POP3 or IMAP with TLS is more
> like HTTPS than HTTP.
>
> If your provider supports TLS, your credentials should _NOT_ be sent in the
> clear.
>
> To determine if your server handles TLS, use telnet:
>
>   # telnet servername pop3
>   capa
>   quit
>
> if it responds with "STLS", TLS is supported.
>
> For IMAP:
>   # telnet servername pop3
>   a CAPABILITY
>   a LOGOUT
>
> if it responds with "STARTTLS", TLS is supported.
>
> Then you need to be using a mail client that will _also_ use TLS.  Most of
> them will.
>
> In short, what happens with either POP3 or IMAP is that the mail client
> connects and asks for "capabilities" before logging in.  If the server says
> it supports TLS, the client may then send the appropriate command to start
> TLS.  The two machines set up a TLS encrypted connection, _then_ your
> client logs in.
> --
> derek
>
>
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