[BlueOnyx:03596] Re: Mail Bounces sometimes

[David Booth]

David Booth
Goulburn Internet
+61 2 48 229131
On 15/02/2010, at 10:23 AM, Chris Gebhardt - VIRTBIZ Internet wrote:

> Hi Darrell,
>
> Darrell D. Mobley wrote:
>>> If your site is named "www.company.com" in the GUI and has the Email
>>> Server Alias "company.com", then this is the minimum set of DNS 
>>> records
>>> you ought to have:
>>>
>>>  company.com	 	---- A Record ----> 	 <IP-Address>
>>>  www.company.com	---- A Record ---->	 <IP-Address>
>>>  company.com	 	---- MX Record --->	 www.company.com (*)
>>>  www.company.com	---- MX Record --->	 www.company.com (*)
>>>  <IP-Address>	 	---- Reverse ----->	 company.com (***)
>>>
>>> (*) = This MUST be the exact name (including the hostname part) of 
>>> the
>>> domain as shown in the GUI interface.
>>
>> Are you saying that you must never deviate from the MX record for
>> company.com pointing to www.company.com, or if you have this minimum 
>> setup?
>> If you have an A record mail.company.com, is it ok for the MX record 
>> for
>> company.com to then point to mail.company.com?
>
> Make sure that the MX is:
> #1: pointed to a valid A record,
> #2: the domain itself is listed as a valid email alias in the GUI, and;
> #3: the A record for the MX is listed as an email alias in the GUI.
>
> If that's in place, you should be set.


>>> company.com	 	---- MX Record ----> 	 company.com
>>> company.com	 	---- A Record ----> 	 <IP-Address>
>>> company.com	 	mail server alias in gui

is minimum to receive mail for users at company.com

>> (***) You must have reverse delegation authority for that network
>> address in order for this to work. Or ask your network provider to set
>> up a reverse for you. Or at the worst check that your IP has a reverse
>> record already.
>
> And the rule is only one reverse pointer per IP, otherwise it wouldn't 
> work,
> correct?  Do many network providers allow customers to set their own 
> reverse
> records?  How would one know, without asking the provider?

If you offer smtp to users for sending mail there should be a reverse 
address for the server. Otherwise many (most!) receiving servers will 
object.