[Tech] postfix e relayhost

[Alessandro]

scm@scmlink.it ha scritto:

>Grazie, sembra funzioni anche se, alla ricezione su un'altra macchina, il
>campo "da" dice sempre root e poi [pluto@isp.it]. Spero che comunque basti
>al server dell'ISP.
>L'altro problema, prima di attivare il relayhost sull'ISP, è
>l'autenticazione. Dove metto username e password di pluto@isp.it.
>Ciao.
>                          ricc
>  
>
Purtroppo non ho modo di provarlo al volo ma pare piuttosto veloce:

aggiungi in /etc/postfix/main.cf:
    smtp_sasl_auth_enable = yes
    smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

e modifichi /etc/postfix/sasl_passwd:
    foo.com                     username:password
    bar.com                     username
    [mail.myisp.net]            username:password
    [mail.myisp.net]:submission username:password

non so, aggiornaci con le prove che fai!!!

buon lavoro,

alessandro


============== copio-incollo ==============


Enabling SASL authentication in the Postfix SMTP client

Turn on client-side SASL authentication, and specify a table with
per-host or per-destination username and password information. Postfix
first searches the table for an entry with the server hostname; if no
entry is found, then Postfix searches the table for an entry with the
next-hop destination. Usually, that is the right-hand part of an email
address, but it can also be the information that is specified with the
relayhost parameter or with a transport(5) table.

/etc/postfix/main.cf:
    smtp_sasl_auth_enable = yes
    smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

/etc/postfix/sasl_passwd:
    foo.com                     username:password
    bar.com                     username
    [mail.myisp.net]            username:password
    [mail.myisp.net]:submission username:password

Note: some SMTP servers support PLAIN or LOGIN authentication only. By
default, the Postfix SMTP client does not use authentication methods
that send plaintext passwords, and defers delivery with the following
error message: "Authentication failed: cannot SASL authenticate to
server". To enable plaintext authentication specify, for example:

/etc/postfix/main.cf:
    smtp_sasl_security_options =

The SASL client password file is opened before the SMTP server enters
the optional chroot jail, so you can keep the file in /etc/postfix.

Note: Some SMTP servers support authentication mechanisms that, although
available on the client system, may not in practice work or possess the
appropriate credentials to authenticate to the server. It is possible
via the smtp_sasl_mechanism_filter parameter to further restrict the
list of server mechanisms that the smtp(8) client will take into
consideration.

The Postfix SMTP client is backwards compatible with SMTP servers that
use the non-standard "AUTH=method..." syntax in response to the EHLO
command; there is no Postfix client configuration needed to work around it.