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Subject : Re: LUG: Sendmail and Squirrelmail

From : Barry Eriksen <barry_eriksen@ncsu.[redacted]>

Date : Mon, 28 Nov 2005 11:32:47 -0500

Parent

You might find some of the free online tools for DNS setup and mail
troubleshooting helpful. I've used zoneedit.com in the past (there are
probably better ones). A couple of links:

Online SMTP test utility
http://www.zoneedit.com/smtp.html

Online DNS lookup tool
http://www.zoneedit.com/lookup.html

FAQ
http://www.zoneedit.com/doc/faq.html#faq9


Barry

Brian Sadler wrote:
> 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.
>>
>>--
>>This message has been scanned for viruses and
>>dangerous content by MailScanner, and is
>>believed to be clean.
>>
>>
>
>
>
>

--
Barry Eriksen
Information Technology Division (ITD)
NC State University
2620 Hillsborough Street
Campus Box 7109
Raleigh, NC 27695
Ph: XXX-513-7775
Fx: XXX-513-1893
Pg: XXX-393-0818