Re: [CentOS] Strange Postfix problem

[TE Dukes]

 

> -Original Message-
> From: centos-boun...@centos.org 
> [mailto:centos-boun...@centos.org] On Behalf Of SilverTip257
> Sent: Tuesday, April 09, 2013 8:25 PM
> To: CentOS mailing list
> Subject: Re: [CentOS] Strange Postfix problem
> 
> On Tue, Apr 9, 2013 at 7:34 PM, Rob Kampen 
> wrote:
> 
> > On 04/10/2013 03:58 AM, tdu...@palmettoshopper.com wrote:
> >
> >> Hello,
> >>
> >> Was trying to setup postfix on my home PC. Running Centos 6.4. I 
> >> don't have a static IP and use zoneedit and ddclient to keep my 
> >> installation of zoneminder current.
> >>
> >> So I decided I wanted to get zoneminder to send me email 
> alerts. Sent 
> >> some test messages but none were sent.
> >>
> >> I went to webdnstools website thinking maybe there is a dns or 
> >> network problem.
> >>
> >> When it checks my dns setup, everything is fine except the mail 
> >> server is has the wrong IP address. The A record and the 
> www A record 
> >> have the correct IP. The IP address its reporting is one 
> that belongs to my ISP.
> >>
> > sounds like your ISP only allows certain services through and 
> > intercepts the rest as you do not have a fixed IP.
> >
> 
> Consider setting up Postfix to auth (with your ISP email 
> credentials) and send mail through your ISP's mail server.  
> I've seen write-ups for using Gmail in the same way.
> http://www.cyberciti.biz/faq/postfix-smtp-authentication-for-m
> ail-servers/
> 
> 
> > may want to talk to them as they control the DNS and 
> reverse DNS, both 
> > of
> 
> 
> Not a bad idea, but if he's in a dynamic pool the ISP is 
> unlikely to help him out.
> Does he really need a static?
> 
> 
> > which should be correct for email servers to function correctly.
> > Basically, to do an email server you need a fixed IP.
> 
> 
> Do you need to receive mail or just send it?
> See the URL above if you just need to send.

I will look into that as I just want to send mail.

Thanks

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Re: [CentOS] Strange Postfix problem

[TE Dukes]

 

> -Original Message-
> From: centos-boun...@centos.org 
> [mailto:centos-boun...@centos.org] On Behalf Of Rob Kampen
> Sent: Tuesday, April 09, 2013 7:35 PM
> To: CentOS mailing list
> Subject: Re: [CentOS] Strange Postfix problem
> 
> On 04/10/2013 03:58 AM, tdu...@palmettoshopper.com wrote:
> > Hello,
> >
> > Was trying to setup postfix on my home PC. Running Centos 
> 6.4. I don't 
> > have a static IP and use zoneedit and ddclient to keep my 
> installation 
> > of zoneminder current.
> >
> > So I decided I wanted to get zoneminder to send me email 
> alerts. Sent 
> > some test messages but none were sent.
> >
> > I went to webdnstools website thinking maybe there is a dns 
> or network 
> > problem.
> >
> > When it checks my dns setup, everything is fine except the 
> mail server 
> > is has the wrong IP address. The A record and the www A record have 
> > the correct IP. The IP address its reporting is one that 
> belongs to my ISP.
> sounds like your ISP only allows certain services through and 
> intercepts the rest as you do not have a fixed IP.
> may want to talk to them as they control the DNS and reverse 
> DNS, both of which should be correct for email servers to 
> function correctly. 
> Basically, to do an email server you need a fixed IP.

I kind of suspected that. However, if I go to yougetsignal, port forwarding
tester and check ports 25 and 110 for my domain, the ports are open. If I do
mail.domain.com, the port is closed.

It sounds as though they are intercepting requests on those ports.

Thanks!!

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Re: [CentOS] Strange Postfix problem

[Rob Kampen]

On 04/10/2013 12:25 PM, SilverTip257 wrote:

On Tue, Apr 9, 2013 at 7:34 PM, Rob Kampen wrote:


On 04/10/2013 03:58 AM, tdu...@palmettoshopper.com wrote:


Hello,

Was trying to setup postfix on my home PC. Running Centos 6.4. I don't
have a static IP and use zoneedit and ddclient to keep my installation
of zoneminder current.

So I decided I wanted to get zoneminder to send me email alerts. Sent
some test messages but none were sent.

I went to webdnstools website thinking maybe there is a dns or network
problem.

When it checks my dns setup, everything is fine except the mail server
is has the wrong IP address. The A record and the www A record have the
correct IP. The IP address its reporting is one that belongs to my ISP.


sounds like your ISP only allows certain services through and intercepts
the rest as you do not have a fixed IP.


Consider setting up Postfix to auth (with your ISP email credentials) and
send mail through your ISP's mail server.  I've seen write-ups for using
Gmail in the same way.
http://www.cyberciti.biz/faq/postfix-smtp-authentication-for-mail-servers/
This effectively shields your email server from the internet - all mail 
will appear to come from the ISP's mail IP and thus your dynamic IP will 
not matter.
reception of mail will be by whomever the MX record points to - a fixed 
IP. you will probably need to use a mail client to retrieve mail from 
the ISP provided IMAP server.



may want to talk to them as they control the DNS and reverse DNS, both of


Not a bad idea, but if he's in a dynamic pool the ISP is unlikely to help
him out.
Does he really need a static?



which should be correct for email servers to function correctly.
Basically, to do an email server you need a fixed IP.


Do you need to receive mail or just send it?
See the URL above if you just need to send.





TIA


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Re: [CentOS] Strange Postfix problem

[SilverTip257]

On Tue, Apr 9, 2013 at 7:34 PM, Rob Kampen wrote:

> On 04/10/2013 03:58 AM, tdu...@palmettoshopper.com wrote:
>
>> Hello,
>>
>> Was trying to setup postfix on my home PC. Running Centos 6.4. I don't
>> have a static IP and use zoneedit and ddclient to keep my installation
>> of zoneminder current.
>>
>> So I decided I wanted to get zoneminder to send me email alerts. Sent
>> some test messages but none were sent.
>>
>> I went to webdnstools website thinking maybe there is a dns or network
>> problem.
>>
>> When it checks my dns setup, everything is fine except the mail server
>> is has the wrong IP address. The A record and the www A record have the
>> correct IP. The IP address its reporting is one that belongs to my ISP.
>>
> sounds like your ISP only allows certain services through and intercepts
> the rest as you do not have a fixed IP.
>

Consider setting up Postfix to auth (with your ISP email credentials) and
send mail through your ISP's mail server.  I've seen write-ups for using
Gmail in the same way.
http://www.cyberciti.biz/faq/postfix-smtp-authentication-for-mail-servers/


> may want to talk to them as they control the DNS and reverse DNS, both of


Not a bad idea, but if he's in a dynamic pool the ISP is unlikely to help
him out.
Does he really need a static?


> which should be correct for email servers to function correctly.
> Basically, to do an email server you need a fixed IP.


Do you need to receive mail or just send it?
See the URL above if you just need to send.


>
>
>> TIA
>>
>>
>> __**_
>> CentOS mailing list
>> CentOS@centos.org
>> http://lists.centos.org/**mailman/listinfo/centos
>>
>
>
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>


-- 
---~~.~~---
Mike
//  SilverTip257  //
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Re: [CentOS] Strange Postfix problem

[Rob Kampen]

On 04/10/2013 03:58 AM, tdu...@palmettoshopper.com wrote:

Hello,

Was trying to setup postfix on my home PC. Running Centos 6.4. I don't
have a static IP and use zoneedit and ddclient to keep my installation
of zoneminder current.

So I decided I wanted to get zoneminder to send me email alerts. Sent
some test messages but none were sent.

I went to webdnstools website thinking maybe there is a dns or network
problem.

When it checks my dns setup, everything is fine except the mail server
is has the wrong IP address. The A record and the www A record have the
correct IP. The IP address its reporting is one that belongs to my ISP.
sounds like your ISP only allows certain services through and intercepts 
the rest as you do not have a fixed IP.
may want to talk to them as they control the DNS and reverse DNS, both 
of which should be correct for email servers to function correctly. 
Basically, to do an email server you need a fixed IP.


TIA


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[CentOS] Strange Postfix problem

[tdukes]

Hello,

Was trying to setup postfix on my home PC. Running Centos 6.4. I don't
have a static IP and use zoneedit and ddclient to keep my installation
of zoneminder current.

So I decided I wanted to get zoneminder to send me email alerts. Sent
some test messages but none were sent.

I went to webdnstools website thinking maybe there is a dns or network
problem.

When it checks my dns setup, everything is fine except the mail server
is has the wrong IP address. The A record and the www A record have the
correct IP. The IP address its reporting is one that belongs to my ISP.

TIA


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