Fedora sendmail auth

[Rick Stevens]

Craig White wrote:
> On Fri, 2009-05-08 at 17:50 -0400, Kevin J. Cummings wrote:
>> Steven W. Orr wrote:
>>> Sorry but this is exactly what I didn't want. When I said gentle I really 
>>> meant it. If I'm sitting in a hotel then how does my access file know if 
>>> it's my laptop? What is MSA with login creds? How do I enable SSL, and 
>> MSA is the Mail Submission Agent.  It requires that you login to the 
>> server using a username/password known to the server in order to be able 
>> to use it.  Failure to login == failure to use the submission port.
>>
>> Sorry, I don't know of a simple HOWTO, but in order that you don't have 
>> an "open mail relay" that any spammer can use, you have to close it off 
>> somehow.  It should be sufficient for your email client (wherever it is) 
>> to be able to authenticate with your mail server.  Perhaps googling MSA 
>> will turn up some information on how it works, and what you will need to 
>> do in order to use it.  It is specifically designed for your case of 
>> being outside you local network.
> ----
> in both cases (pop3/imap) and smtp submission, if you don't have
> certificates, you are authenticating in clear text which means that
> anyone can simply sniff the packets and get your login id & password.
> 
> I don't let ports 110 and 143 through the firewall at all. Thus a remote
> user (and this means blackberry or iPhone or whatever), would have to
> use either pop3s or imaps
> 
> Likewise, smtp can be set up in a variety of ways but I have to agree
> with another person up-thread...postfix makes this easy and so I stopped
> using sendmail but the only way someone can log into my smtp servers is
> via TLS, otherwise, it only accepts mail via unauthenticated and of
> course subject to all sorts of rules as to whether e-mail is accepted
> for delivery either locally or via relay.
> 
> My suggestion for OP would be to install some web-based e-mail system
> and just login from anywhere with any web browser.

Uh, "yum -y install squirrelmail"?
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- Rick Stevens, Systems Engineer                      ricks at nerd.com -
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