Bind to a specific interface for outgoing SMTP sessions

permalink · 14/04/2006, 13h16

Hi,

Is it possible to bind to a specific interface for outgoing SMTP sessions?
I've got one real interface with 3 aliases configured for it. I'd like to use
one of those aliases as the interface which is used for sending mail out.

Can this be done with postfix? I know how to do it with sendmail and exim,
but that won't get me far as I'm using postfix at the moment

Thanx,

--
Jeffrey Overman

Everybody needs to believe in something, I believe I'll have another beer...

permalink · 14/04/2006, 16h30

Jeffrey Overman wrote:
> Hi,
>
> Is it possible to bind to a specific interface for outgoing SMTP sessions?
> I've got one real interface with 3 aliases configured for it. I'd like to use
> one of those aliases as the interface which is used for sending mail out.
>
> Can this be done with postfix? I know how to do it with sendmail and exim,
> but that won't get me far as I'm using postfix at the moment

>
> Thanx,
>

Some relevant configs in main.cf:

inet_interfaces - contols which IP addresses that Postfix listens on.

smtp_bind_address - specifies which IP address to send email from.

myhostname - sets the Postfix name for the mail server

--
Greg

permalink · 15/04/2006, 10h06

On Fri, 14 Apr 2006 15:30:16 +0000, Greg Hackney wrote:

> Jeffrey Overman wrote:
>> Hi,
>>
>> Is it possible to bind to a specific interface for outgoing SMTP sessions?
>> I've got one real interface with 3 aliases configured for it. I'd like to use
>> one of those aliases as the interface which is used for sending mail out.
>>
>> Can this be done with postfix? I know how to do it with sendmail and exim,
>> but that won't get me far as I'm using postfix at the moment

>>
>> Thanx,
>>
>
>
> Some relevant configs in main.cf:
>
> inet_interfaces - contols which IP addresses that Postfix listens on.
>
> smtp_bind_address - specifies which IP address to send email from.
>
> myhostname - sets the Postfix name for the mail server7

The smtp_bind_address did the trick. Thanx! The only strange thing is
that when I do a 'postconf -d' and grep for the option, it doesn't have
the IP address I configured associated with it. But when I look at the
logs of another MTA under my control, I can see that the SMTP session is
bound to the right IP address.

Greetz,

--
Jeffrey Overman

Everybody needs to believe in something, I believe I'll have another beer...

permalink · 15/04/2006, 10h57

On Sat, 15 Apr 2006 11:06:00 +0200, Jeffrey Overman wrote:

> On Fri, 14 Apr 2006 15:30:16 +0000, Greg Hackney wrote:
>
>> Jeffrey Overman wrote:
>>> Hi,
>>>
>>> Is it possible to bind to a specific interface for outgoing SMTP sessions?
>>> I've got one real interface with 3 aliases configured for it. I'd like to use
>>> one of those aliases as the interface which is used for sending mail out.
>>>
>>> Can this be done with postfix? I know how to do it with sendmail and exim,
>>> but that won't get me far as I'm using postfix at the moment

>>>
>>> Thanx,
>>>
>>
>>
>> Some relevant configs in main.cf:
>>
>> inet_interfaces - contols which IP addresses that Postfix listens on.
>>
>> smtp_bind_address - specifies which IP address to send email from.
>>
>> myhostname - sets the Postfix name for the mail server7
>
> The smtp_bind_address did the trick. Thanx! The only strange thing is
> that when I do a 'postconf -d' and grep for the option, it doesn't have

Okay, that's a brain fart on my side. I shouldn't use the -d flag if I
want to see the actual value *doh*.

I'm going to get another cup of coffee.

Greetz,

--
Jeffrey Overman

Everybody needs to believe in something, I believe I'll have another beer...

14/04/2006, 13h16	#1 (permalink)
Jeffrey Overman Messages: n/a Hébergeur:	Bind to a specific interface for outgoing SMTP sessions Hi, Is it possible to bind to a specific interface for outgoing SMTP sessions? I've got one real interface with 3 aliases configured for it. I'd like to use one of those aliases as the interface which is used for sending mail out. Can this be done with postfix? I know how to do it with sendmail and exim, but that won't get me far as I'm using postfix at the moment Thanx, -- Jeffrey Overman Everybody needs to believe in something, I believe I'll have another beer...

14/04/2006, 16h30	#2 (permalink)
Greg Hackney Messages: n/a Hébergeur:	Re: Bind to a specific interface for outgoing SMTP sessions Jeffrey Overman wrote: > Hi, > > Is it possible to bind to a specific interface for outgoing SMTP sessions? > I've got one real interface with 3 aliases configured for it. I'd like to use > one of those aliases as the interface which is used for sending mail out. > > Can this be done with postfix? I know how to do it with sendmail and exim, > but that won't get me far as I'm using postfix at the moment > > Thanx, > Some relevant configs in main.cf: inet_interfaces - contols which IP addresses that Postfix listens on. smtp_bind_address - specifies which IP address to send email from. myhostname - sets the Postfix name for the mail server -- Greg

15/04/2006, 10h06	#3 (permalink)
Jeffrey Overman Messages: n/a Hébergeur:	Re: Bind to a specific interface for outgoing SMTP sessions On Fri, 14 Apr 2006 15:30:16 +0000, Greg Hackney wrote: > Jeffrey Overman wrote: >> Hi, >> >> Is it possible to bind to a specific interface for outgoing SMTP sessions? >> I've got one real interface with 3 aliases configured for it. I'd like to use >> one of those aliases as the interface which is used for sending mail out. >> >> Can this be done with postfix? I know how to do it with sendmail and exim, >> but that won't get me far as I'm using postfix at the moment >> >> Thanx, >> > > > Some relevant configs in main.cf: > > inet_interfaces - contols which IP addresses that Postfix listens on. > > smtp_bind_address - specifies which IP address to send email from. > > myhostname - sets the Postfix name for the mail server7 The smtp_bind_address did the trick. Thanx! The only strange thing is that when I do a 'postconf -d' and grep for the option, it doesn't have the IP address I configured associated with it. But when I look at the logs of another MTA under my control, I can see that the SMTP session is bound to the right IP address. Greetz, -- Jeffrey Overman Everybody needs to believe in something, I believe I'll have another beer...

15/04/2006, 10h57	#4 (permalink)
Jeffrey Overman Messages: n/a Hébergeur:	Re: Bind to a specific interface for outgoing SMTP sessions On Sat, 15 Apr 2006 11:06:00 +0200, Jeffrey Overman wrote: > On Fri, 14 Apr 2006 15:30:16 +0000, Greg Hackney wrote: > >> Jeffrey Overman wrote: >>> Hi, >>> >>> Is it possible to bind to a specific interface for outgoing SMTP sessions? >>> I've got one real interface with 3 aliases configured for it. I'd like to use >>> one of those aliases as the interface which is used for sending mail out. >>> >>> Can this be done with postfix? I know how to do it with sendmail and exim, >>> but that won't get me far as I'm using postfix at the moment >>> >>> Thanx, >>> >> >> >> Some relevant configs in main.cf: >> >> inet_interfaces - contols which IP addresses that Postfix listens on. >> >> smtp_bind_address - specifies which IP address to send email from. >> >> myhostname - sets the Postfix name for the mail server7 > > The smtp_bind_address did the trick. Thanx! The only strange thing is > that when I do a 'postconf -d' and grep for the option, it doesn't have Okay, that's a brain fart on my side. I shouldn't use the -d flag if I want to see the actual value doh. I'm going to get another cup of coffee. Greetz, -- Jeffrey Overman Everybody needs to believe in something, I believe I'll have another beer...

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