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sunhux

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sending email to xxx@SMTP_email_server_IP_address & registering MX / SMTP server addr


Hi

Pending the purchase of our domain,  I have already set up an
SMTP email server running postfix & this server has been given
a public IP address, say aa.bb.cc.dd

Q1
Can I test send an email to this server by sending to
a_postfix_mailbox@aa.bb.cc.dd ?

Q2:
Secondly after getting the domain, how do I link my SMTP server's
IP address so that it appears in MX record ?  The domain provider
I'm using is Adicio (it's just a website & we have to DIY, I'm not sure
if there's a support hotline to call)
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Ernie Beek
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sunhux

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Q1:
 I told my boss & the security guys that they have to permit SMTP (Tcp 25) to the whole
Internet & they insisted that since there's only a handful of organizations (about 5-6) that
send emails to my postfix/SMTP server, the firewall rule should be such that it permits
only those few organizations' SMTP servers to connect to my postfix server on Tcp25.
Looks like from your answer, email is relayed across several hops & it may be an SMTP
server that's totally unrelated to those organizations' (& their domains) that could be
connecting to my postfix server on Tcp 25, is this right?

Q2:
Out of curiosity, if the domain provider is running a DNS/BIND on a Linux box, what's
the commands that they would issue to get this done?
     
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Bear with me, one last question :

since my server's already been given a public IP address, how do I
assign this public IP address to the new domain I've just bought?
PTR record?  or how exactly is the DNS/BIND record being defined
(with a sample format of the record if possible)

Many thanks
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and oh, someone from postfix list told me I can send test emails in advance
(prior to my domain being registered) by addressing the test emails to :
   recipient@[a.b.c.d]
where a.b.c.d is the public IP address of my SMTP/postfix server.

Well, gmail won't accept something with brackets in its "To: " field, & I
tested with Outlook webmail - those mails bounced with the message:
  recipeint@ (MOBILE:203126130167)
  To be able to send text messages, you need to set up your text messaging account.
  Click here to set up your account.
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Thanks Ernie.

So in your last reply 1.2.3.4 is the public IP address of my SMTP postfix server
or my webserver?  I don't have a webserver
I think you should also try that from a postfix server. That isn't a correct syntax when using anemail client.
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ASKER


So I guess I don't have to do anything further about PTR record as my ISP
who assigned me the public IP address would have set up the PTR record
in the first place, is this right?
Ok, allready posted that before so i thought you wanted a web address as well.

Then it is:

yourdomain.com.        IN    A     1.2.3.4
mail.yourdomain.com.   IN    MX    10 yourdomain.com.
Depends, normally they night set up a PTR record but with a generic name. You would like it to point back at the domain you just set up.
night = might :-~
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'excellent