Postfix smarthost with authentication

[Tomás Crespo]

Hi! I’ve currently a Exim doing smarthost work, but I want to migrate to
Postfix, but I’ve some configuration problems.

 

My Exim authenticate with my ISP mail server using a username and a
password. The username is always the sender email address, and the password
is always the same for all users.

 

Now, I getting this with Exim with these lines:

 

cram_md5:

  driver = cram_md5

  public_name = CRAM-MD5

  client_name   = $sender_address

  client_secret = samepasswordforeveryone

 

I’ve read about sender_dependent_relayhost_maps in Postfix, but I don’t want
to manage a list with all users, and have to add or remove when a new user
is created or deleted.

 

I want postfix use a variable (sender address) as login and always the same
password to authenticate with my ISP SMTP.

 

Is that posible??

 

Thank you very much

Tomás Crespo