make my own smtp server

Hi All,

I have a customer with about 60 workstations using
Thunderbird for their eMail. They are all behind
a CentOS 5.4 server acting as firewall and router
(among other things).

Problem: we use a third party eMail server. Their
smtp server has some kind of filter, probably a spam
filter, on it that is blocking about 2 out of every
three outgoing eMails. (And, of course, they claim
it is all our fault.) This is really, really hurting
a business that lives and dies on its eMail.

How do I turn my CentOS firewall/router/server into
our own smtp server? The server has a fixed IP, but no
DNS (MX) mail record. Do I need to to get an MX record
put on the domain?

Many thanks,
-T
.

Relevant Pages

  • Re: CEICW fails at firewall config
    ... Do you or do you not have ISA 2000 or ISA 2004 installed on the SBS server? ... Do you have 2 NICs in the SBS? ... CEICW fails on firewall configuration every time. ... >>> Call to Creating the protected networks access rule returned ok. ...
    (microsoft.public.windows.server.sbs)
  • Re: Recycler security issues on IIS server
    ... > latest upates to the server. ... > like to see the server put behind our firewall, ... other software, install all patches, IISlockdown, URLscan, use the correct ... the procedures you follow may vary depending on your security needs. ...
    (microsoft.public.inetserver.iis.security)
  • Re: ISA SERVER NOT STARTING
    ... I delete the nat/basic firewall and stop and started the RRAS an tried to ... There were no critical events in the DNS Server Log in the last 24 hours. ... An error occurred during logon ... Caller User Name: - ...
    (microsoft.public.windows.server.sbs)
  • Re: For Microsoft Partners and Customers Who Cant Download or Access
    ... to reconfigure the firewall, but to use a static IP on your client ... and to make sure that the DNS server entries on the client are ... Microsoft for msdn2.microsoft.com. ... use a static IP and set the DNS server addresses to the DNS ...
    (microsoft.public.dotnet.general)
  • RE: Is this as bad as it seems?
    ... The network being protected by the router or firewall is still vulnerable to ... > circumvented - the administrator has explicitly allowed HTTP traffic on ... this exploit has the effect of allowing the attacker to send *INBOUND* HTTP ... The HTTP server (located on the internal network or anywhere else that is ...
    (Security-Basics)