External and internal SMTP port

[ofh]

Hi
I still hope to setup proxmox and Novell Groupwise.(No succes yet !)
To try to understand your terms in the manual, i ask this question:

What is the difference between "External" and "Internal" SMTP port ??

Please explain the difference.

When the Proxmox only have one IP-address, how is it possible to listen on 2 different ports (25&26).

Or have I totaly misunderstood all ?!

Best regards
Ole Friis Heesgaard

 

[martin]

Hi
I still hope to setup proxmox and Novell Groupwise.(No succes yet !)
To try to understand your terms in the manual, i ask this question:

What is the difference between "External" and "Internal" SMTP port ??

Hi,

on the external port, proxmox receives e-mails from the internet. on the internal port proxmox receives outgoing e-mails from your internal mail server (review the smarthost settings)

by using different ports, we know if the e-mail comes from internal or external and we can apply our filtering technology. for example, it makes no sense to do greylisting or SPF checks on internal e-mails.

martin

 

[ofh]

Port 25 on both External and Internal

Thanks for reply (have read the reply long time ago).
I have one more question.
What wil happen if I use port 25 for both External and Internal :?:

 

[michael pilz]

Re: Port 25 on both External and Internal

Hi Ole
Than it will NOT work :!:
Best regards, Michael Pilz

Thanks for reply (have read the reply long time ago).
I have one more question.
What wil happen if I use port 25 for both External and Internal :?:

 

[Poggy]

To add to a spin to this...

(Sorry if this sounds simple)
If Im using an internal Exchange box but will not be relaying messages from it through Proxmox out to the internet, I should not need to change the SMTP port on it. Does this sound correct? I have other servers which are using Exchange to relay proprietary messages out to customers and changing the port may prove difficult as they are hard-coded in at least one instance.

Thanks again.

 

[martin]

To add to a spin to this...

(Sorry if this sounds simple)
If Im using an internal Exchange box but will not be relaying messages from it through Proxmox out to the internet, I should not need to change the SMTP port on it. Does this sound correct? I have other servers which are using Exchange to relay proprietary messages out to customers and changing the port may prove difficult as they are hard-coded in at least one instance.

Thanks again.

hi,
if you do not want to send outgoing messages through proxmox, you do not have to change your exchange settings.

keep in mind, you will not get statistics, outgoing virusscanning, disclaimers, etc.

you can reconfigure your other systems also to use proxmox as outgoing smtp if you want.

regards,
martin