Re: Use MX record when sending to $mydomain

[cont...@rusanu.com]

Thanks Ansgar,

As I copied the output of postconf something did stood out as 'fix  
me': the $mydestination included $mydomain, I changed $mydestination  
to be localhost only and it works fine.


Regards,
~ Remus


On Nov 19, 2009, at 12:25 AM, Ansgar Wiechers wrote:


On 2009-11-18 cont...@rusanu.com wrote:
I'm using sendmail to send to someu...@mydomain.com from the  
machine

that is the A DNS of mydomain, but is not the MX one. postfix relays
this to 127.0.0.1 and it gets rejected with 450 user unknown. I want
it to use the normal rules and deliver it to the MX registered  
address

for mydomain.com, where my pop box is.

I looked over the main.cf but nothing jumped out 'fix me here' to
solve this. Any hint?


Please post the output of postconf -n. And if you must obfuscate  
your

domain name, please use names from RFC 2606. They're reserved for
exactly this purpose.

Regards
Ansgar Wiechers
--
All vulnerabilities deserve a public fear period prior to patches
becoming available.
--Jason Coombs on Bugtraq

Re: Attempt MX, fallback to relay in case of error only

[cont...@rusanu.com]

Thanks Andreas,

The reject would be '553 Mail from ... not allowed', so it sounds like  
a dead end trying to configure postfix to handle this.

Suggestions on how to workaround are welcome.

Thanks,
~ Remus

On Nov 18, 2009, at 1:12 AM, lst_ho...@kwsoft.de wrote:


Zitat von cont...@rusanu.com cont...@rusanu.com:

Is there a way to configure postfix to use a relay only if direct  
delivery is rejected? The case being a web application that has to  
send notification to subscribers, but some servers reject the  
connection (app IP originates from AWS EC2). I want those cases to  
be retried using a paid SMTP relay like authsmtp.com. However I  
don't want to use the relay for everything since it costs per mail.


If it is rejected with a permanent error code (5xx) no retry an no  
fallback will happen. This is required by RFC.
If the reject is with some temporary reject code or the connection  
is not accepted at all you need the fallback_relay parameter.


Regards

Andreas

Use MX record when sending to $mydomain

[cont...@rusanu.com]

Hello,

I'm using sendmail to send to someu...@mydomain.com from the machine  
that is the A DNS of mydomain, but is not the MX one. postfix relays  
this to 127.0.0.1 and it gets rejected with 450 user unknown. I want  
it to use the normal rules and deliver it to the MX registered address  
for mydomain.com, where my pop box is.


I looked over the main.cf but nothing jumped out 'fix me here' to  
solve this. Any hint?


Thanks,
~ Remus

Attempt MX, fallback to relay in case of error only

[cont...@rusanu.com]

Is there a way to configure postfix to use a relay only if direct  
delivery is rejected? The case being a web application that has to  
send notification to subscribers, but some servers reject the  
connection (app IP originates from AWS EC2). I want those cases to be  
retried using a paid SMTP relay like authsmtp.com. However I don't  
want to use the relay for everything since it costs per mail.


Thanks,
~ Remus