SPF Check

[fearworks]

Hi my friends.....

Please I would like to know how can I configure in my Sentora, what postfix or my server, check spf record from all my ingoing mails to avoid a lot of ingoing spam... please may you to help me?????

Thanks...

I will post my steps for installing SPF, but please note that I use CentOS 7 and this might not work for other OS systems, and that I haven't tested these steps as I present them here (I also install other things at the same time as I set up SPF checks) so perhaps try them on a test server first

Install the SPF Policy Daemon:

Code:

yum install pypolicyd-spf

Edit the Postfix master.cf file:

Code:

vi /etc/sentora/configs/postfix/master.cf

At the end of this file, add:

Code:

policy-spf      unix    -       n       n       -       -       spawn
  user=nobody argv=/usr/libexec/postfix/policyd-spf

and save the changes.

Edit the Postfix main.cf file:

Code:

vi /etc/sentora/configs/postfix/main.cf

Cursor down to the smtpd_recipient_restrictions value and find the line:

Code:

reject_unauth_destination,

Right after this line, add a new line with this:

Code:

check_policy_service unix:private/policy-spf,

Now go to the end of this same file and add:

Code:

policy-spf_time_limit = 3600s

and save the changes.

Restart Postfix:

Code:

systemctl start postfix

I forget where I got this info from as I have my own notes for setting up servers etc. and I just extracted the above from these notes, but I think it might have been here: https://zurgl.com/how-to-configure-spf-in-postfix/

Let us know how you get on.

Keith.