Hi all..
I would like to switch to CENTOS Postfix from sendmail. My current sendmail, in combination with
the very old obtuse-smtpd, allows me:
1. To control who of the internal users can send mail and to which domain or accounts
2. To control who of the internal users can receive mail and from which domain or accounts
3. To obtain a copy of all sent mails
4. To obtain a copy of all received mails
Obtuse-smtpd is very easy to configure and very effective. It takes control of all smtp activities over Port
25 and, after filtering and checking, passes the safe mails to sendmail for final delivery. Obtuse can, also,
check for addressability, through DNS, of the mail sender and other useful features.
Unfortunately, obtuse-smtpd is so old that it works only (don't be surprised) with old sendmail versions.
So, I always have to uninstall the in-OS shipped modern sendmail version and replace it with the proper
old version.
Now:
Can Postfix do all this ?
Or, at least:
Can Postfix work in combination with obtuse-smtpd ? (at the end, obtuse just calls
sendmail for the real mail delivery; it only receives mail in port 25 and checks what it
receives with its rules, allowing or rejecting at the end)
Thanks a lot, in advance.
M. Leon
On Sat, Dec 01, 2007, Manuel Leon wrote:
Hi all....
I would like to switch to CENTOS Postfix from sendmail. My current sendmail, in combination with
the very old obtuse-smtpd, allows me:
To control who of the internal users can send mail and
You could control access by requiring them to send via the submission port (587) with smtp-auth either using sasl or dovcot and postfix.
To control who of the internal users can receive mail andfrom which domain or accounts
I think would require some work using Chip Salzenberg's deliver program, procmail, or some such MDA (Mail Delivery Agent) behind postfix. Off hand I can't think of how one would do this directly with postfix.
To obtain a copy of all sent mailsTo obtain a copy of all received mails
These two could be handled using always_bcc in postfix's main.cf.
Obtuse-smtpd is very easy to configure and very effective. It takes control of all smtp activities over Port
25 and, after filtering and checking, passes the safe mails to sendmail for final delivery. Obtuse can, also,
check for addressability, through DNS, of the mail sender and other useful features.
Postfix gives lots of options for incoming filtering using DNS, amavisd and clamav etc. There's extensive documentation on the postfix web site, http://www.postfix.org/
Bill -- INTERNET: bill@celestial.com Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way FAX: (206) 232-9186 Mercer Island, WA 98040-0820; (206) 236-1676
People from East Germany have found the West so confusing. It's so much easier when you have only one party. -- Linus Torvalde, Linux Expo Canada when asked about confusion over many Linux distributions.
I would like to switch to CENTOS Postfix from sendmail. My current sendmail, in combination with
the very old obtuse-smtpd, allows me:
To control who of the internal users can send mail andto which domain or accounts
This can be accomplished with smtpd_restrictions_classes
To control who of the internal users can receive mail and fromwhich domain or accounts
Ditto.
To obtain a copy of all sent mails
This can be accomplished using always_bcc
To obtain a copy of all received mails
Ditto.
Obtuse-smtpd is very easy to configure and very effective. It takes control of all smtp activities over Port
25 and, after filtering and checking, passes the safe mails to sendmail for final delivery. Obtuse can, also,
check for addressability, through DNS, of the mail sender and other useful features.
Postfix has extensive capabilities for this as well.
Can Postfix do all this ?
Yes.
Or, at least:
Can Postfix work in combination with obtuse-smtpd ? (at the end, obtuse just calls
Good question. I've never heard of obtuse-smtpd, so I can't tell you, but Postfix generally acts like sendmail on the outside, but completely different on the inside.
sendmail for the real mail delivery; it only receives mail in port 25 and checks what it
receives with its rules, allowing or rejecting at the end)
Postfix does that as well.
Check out Ralf Hildebrandt's postfix resources at http://www.arschkrebs.de/postfix/. Ralf is also the co-author of an excellent Postfix book. You should particularly read the 3 pages about restriction classes.
Barry
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Barry Brimer -
Bill Campbell -
Manuel Leon