Re: LUG: Sendmail and Squirrelmail - Mon, 28 Nov 2005 10:06:27 -0600

Subject : Re: LUG: Sendmail and Squirrelmail

From : "Brian Sadler" <brian.sadler@gillgroup.[redacted]>

Date : Mon, 28 Nov 2005 10:06:27 -0600

Thanks for the quick reply Mark. Here's another quick question.

Can an MX Record be an IP address?

Thanks,

Brian

-----Original Message-----
From: lug-owner@lists.ncsu.[redacted] [mailto:lug-owner@lists.ncsu.[redacted]] On Behalf
Of mark@thefowles.[redacted]
Sent: Monday, November 28, 2005 9:01 AM
To: lug@lists.ncsu.[redacted]
Subject: Re: LUG: Sendmail and Squirrelmail

are you able to do a lookup on your domain from the internet? Just curious
- mail.yourdomain.com .... (this should see the mx record) - The rest of
what you;ve done seems ok (Sending the mail).

You need 25, 109/110 open in your firewall (I think) .. along with 80, and
53 (DNS) .....

- Mark

> Hi everyone,
>
> I am somewhat new to linux so please forgive if this is a stupid or
> newbie question. I am setting up a fedora core 4 linux server to run
> sendmail and squirrel mail for webmail. I also have dovecot installed
> but I'm not 100% sure that I need it.
>
> If my understanding of the mail server is correct, I need to be
> running sendmail (its the MTA), dovecot (for IMAP/POP3 protocol), and
> squirrelmail
> (webmail) to have this mail server setup properly, is this correct? I
> want
> my users to use imap to get their mail for security reasons. We only have
> about 20 users or so will be using this but they do a lot of email. Am I
> correct in feeling that I need all three of these programs to get the mail
> system and webmail running?
>
> If I understand the concepts, sendmail is responsible for handling the
> incoming and outgoing mail. Dovecot is what allows the users to
> access their mail stored on the server via the pop3 or imap protocols,
> and squirrelmail allows them to access the mail via imap using a web
> interface (for when they are at home or on the road). All three of
> these are necessary for mail to run properly except squirrelmail
> (although it is needed for the webmail). Is this correct?
>
> In order to setup this server to accept mail for a domain, I know that
> I have to have the MX record pointed to its ip address. No problem
> there.
>
> I am able to connect using imap and send mail from inside the network
> but I'm having trouble receiving mail from outside the intranet. I
> have a small hole poked in our sites firewall to allow smtp and http
> traffic.
>
> I have a couple test accounts setup and can send mail to outside
> addresses and internal address just fine, but receiving mail seems to
> have a problem from outside. Are the smtp and http protocols ports
> the only ones I need open on the firewall? I believe that they are
> but want to double check the theory.
>
> If I type in an address of username@216.0.0.[redacted] (ip address is not the
> real address), shouldn't mail come to the server?
>
> Also, any suggestions on an easy to use and fairly secure ldap server
> (for a central address book) would also be appreciated or do we not
> need LDAP for a
> central address book.
>
> Any help would be most greatly appreciated.
>
> Sincerely,
>
> Brian
>
> P.S. Telling me to RTFM is not helpful. I've read it. If thats all
> you can say, please don't reply at all. Sorry about this but I've had
> several rude replies from the internet on so called helpsites.
> Hopefully this will be different.
>
> --
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>

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