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Old 02-26-2008, 09:55 AM   #1
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Registered: Mar 2004
Posts: 15

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Wink postfix relay concern

From my dynamicIP ( I already relayed ok through
my ISP (my email address provided from my ISP is
sending to outside my local LAN.
However, when I sent mail with "from" is, to
outside mail address (ex:,
userB who have mail address noticed that
in the mail I sent him above, address in "from" is, not (I want it should show though).
Could anyone help me how I can make it so that it will show
in "from" address of userB?
Below is my main config:
relayhost = [my isp smtp server]
smtp_generic_maps = hash:/etc/postfix/generic
transport_maps = hash:/etc/postfix/transport
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = noanonymous
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_mechanism_filter = plain, login
smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = no
smtpd_sasl_security_options = noanonymous
smtpd_recipient_restrictions = permit_mynetworks,permit_sasl_authenticated,reject_unauth_destination
smtp inet n - n - - smtpd
smtps inet n - n - - smtpd
-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated,reject

generic file:
transport file:
my isp smtp server smtp:[my isp smtp server]

file sasl_passwd:
[my isp smtp server]'s usernameassword
Old 02-26-2008, 02:28 PM   #2
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Registered: Jul 2002
Location: East Centra Illinois, USA
Distribution: Debian stable
Posts: 5,908

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If your ISP is changing the sender address on outgoing mail, there is nothing you can do in postfix configuration to stop that. You will have to discuss it with your ISP.


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