Re: Basic question...

Michael Segel: > All, sorry for posting a basic question? > > I?ve got an old box running as my mail server. > I want to bring up Postfix on my new box and not only have it as my secondary > MX server, I? like to have my mail from the first server replicated to the

Basic question...

All, sorry for posting a basic question… I’ve got an old box running as my mail server. I want to bring up Postfix on my new box and not only have it as my secondary MX server, I’ like to have my mail from the first server replicated to the second server. What’s the best/easiest way to do

Re: basic question: permit SMTP from recipients or whitelist ?

Thanks very much Victor & Jeroen. As I'm a newbie/beginner, guess I'll stick to "sender access map" & see if there are many spoofed emails. I have a lot to learn from this list. Thanks U On Sat, Jan 29, 2011 at 8:35 PM, Victor Duchovni < victor.ducho...@morganstanley.com> wrote: > On Sat, Jan

Re: basic question: permit SMTP from recipients or whitelist ?

On Sat, Jan 29, 2011 at 12:36:35PM +0100, Jeroen Geilman wrote: > Just put those domains in a sender access map. This is easily spoofed, and the OP has stated a desire to not allow spoofed email. Hence some sort of authentication (SPF, DKIM, TLS client certs, bilaterally agreed list of client IPs

Re: basic question: permit SMTP from recipients or whitelist ?

On 1/29/11 11:39 AM, sunhux G wrote: There's only 5 mailboxes (ie a...@mydomain.com , b...@mydomain.com , ..., e...@mydomain.com ) that I'm hosting & it's using postfix. The above 5 mailboxes only receives emails fr

Re: basic question: permit SMTP from recipients or whitelist ?

There's only 5 mailboxes (ie a...@mydomain.com, b...@mydomain.com, ..., e...@mydomain.com) that I'm hosting & it's using postfix. The above 5 mailboxes only receives emails from 6 external domain ie these 5 mailboxes don't send emails out. Does the above describe it? >It is also surprising that

Re: basic question: permit SMTP from recipients or whitelist ?

On Fri, Jan 28, 2011 at 11:36:28PM +0800, sunhux G wrote: > So is it right to say that though I want only a small handful of > users from certain domains/organizations to send email to me, > it could be email gateways (or "mail relay servers" ??) that are > unrelated to those domains/organizations

Re: basic question: permit SMTP from recipients or whitelist ?

So is it right to say that though I want only a small handful of users from certain domains/organizations to send email to me, it could be email gateways (or "mail relay servers" ??) that are unrelated to those domains/organizations that make Tcp25 connection to my email server? As for the externa

Re: basic question: permit SMTP from recipients or whitelist ?

>>b) how do I determine the source IP address of those domains >Email can come from anywhere, via multiple routes that do not > have any direct relation with the sending domain. I thought if I entered the domain name, say dsta.gov.sg into www.mxtoolbox.com, it would list out all the smtp/mail se

Re: basic question: permit SMTP from recipients or whitelist ?

On Thu, Jan 27, 2011 at 02:11:02PM +0800, sunhux G wrote: > I'm setting up a postfix mailserver. Only a handful (of about 6 domains , > ie x...@dsta.gov.sg , x...@starnet.gov.sg, x...@ncssmsonbehalf.com.sg , > x...@accenture.com ) are allowed to email to my postfix server. When you say that on

Re: basic question: permit SMTP from recipients or whitelist ?

On 1/27/11 7:11 AM, sunhux G wrote: I'm setting up a postfix mailserver. Only a handful (of about 6 domains , ie x...@dsta.gov.sg , x...@starnet.gov.sg , x...@ncssmsonbehalf.com.sg , x...@accenture.com

basic question: permit SMTP from recipients or whitelist ?

I'm setting up a postfix mailserver. Only a handful (of about 6 domains , ie x...@dsta.gov.sg , x...@starnet.gov.sg, x...@ncssmsonbehalf.com.sg , x...@accenture.com ) are allowed to email to my postfix server. >From security & efficiency (so as not to process too many emails) point of view, a