[NBLUG/talk] Postfix mail routing

[Christopher Wagner]

Hi Omar, glad to hear it works!  I suspected there was something in 
main.cf I was forgetting but couldn't think of what.

On 09/12/2015 06:23 AM, Omar Eljumaily wrote:
> Thanks Chris.  Your settings work.  One thing that threw me for a 
> while is that I had to set main.cf to read the transport maps file.
>
> transport_maps = hash:/etc/postfix/transport
>
> Thanks,
>
> Omar
>
>
> On 9/11/2015 2:34 PM, Christopher Wagner wrote:
>> I've never done "split delivery" for a domain, where some email 
>> addresses for a domain go to another server, but I think transport 
>> may indeed help.  My own mail server either delivers locally for 
>> various domains, or spam/av filters and relays on to another server 
>> for final delivery, but it's all based on domain, not individual 
>> addresses within a domain.
>>
>> Make sure you read up on Postfix relay setup first and that your 
>> server is configured correctly for relaying.
>>
>> I suspect that this MIGHT work, but don't take my word for it (just 
>> threw this together as a guess):
>>
>> /etc/postfix/transport:
>> user1 at example.com    smtp:[yourserver.local]
>> @example.com    smtp:[foo.gmailsmtpserver.com]
>>
>> /etc/postfix/relay_domains:
>> example.com    OK
>>
>> /etc/postfix/relay_recipients:
>> user1 at example.com    OK
>> user2 at example.com    OK
>>
>> Don't forget to postmap the relevant files before testing!
>>
>> Also, a quick Google turned up:
>> https://groups.yahoo.com/neo/groups/postfix-users/conversations/topics/292099 
>>
>> http://serverfault.com/questions/249561/configure-postfix-to-use-external-mx-servers-for-delivery-of-local-mail-if-user 
>>
>> http://postfix.1071664.n5.nabble.com/split-domain-relay-by-default-td56286.html 
>>
>> https://support.google.com/a/answer/2956491?hl=en
>>
>> Hope this helps.
>>
>> Chris
>>
>> On 09/11/2015 01:03 PM, Omar Eljumaily wrote:
>>> I think this may also solve my problem. If anybody can say yes or no 
>>> really quickly, that would be greatly appreciated.
>>>
>>> http://www.postfix.org/transport.5.html
>>>
>>> Thanks,
>>>
>>> Omar
>>>
>>>
>>>
>>> On 9/11/2015 12:51 PM, Omar Eljumaily wrote:
>>>> Does anybody know how Postfix will route mail if a user doesn't 
>>>> exist on one of the local machine's domains?
>>>>
>>>> I'm trying to set up GMail for business to handle "split delivery." 
>>>> Some of the addresses get handled by GMail and some get handled by 
>>>> my server.  I'm wondering what will happen if my Postfix server 
>>>> sees an email address that doesn't exist for my domain on that 
>>>> server. This will happen when local users send mail through it as a 
>>>> relay. Will it send it along to the proper MX record server, GMail, 
>>>> or will it send it back an error?
>>>>
>>>> I know I can try this, and I will do it over the weekend 
>>>> regardless, but I was wondering if anybody knows what to expect.
>>>>
>>>> Thanks,
>>>>
>>>> Omar
>>>>
>>>> _______________________________________________
>>>> talk mailing list
>>>> talk at nblug.org
>>>> http://nblug.org/cgi-bin/mailman/listinfo/talk
>>>
>>> _______________________________________________
>>> talk mailing list
>>> talk at nblug.org
>>> http://nblug.org/cgi-bin/mailman/listinfo/talk
>>
>> _______________________________________________
>> talk mailing list
>> talk at nblug.org
>> http://nblug.org/cgi-bin/mailman/listinfo/talk
>
> _______________________________________________
> talk mailing list
> talk at nblug.org
> http://nblug.org/cgi-bin/mailman/listinfo/talk