Displaying 20 results from an estimated 2000 matches similar to: "Postfix restrictions"
2019 Sep 19
3
Postfix vs. Thunderbird on Mac OS
Hi,
I'm running our local school's mail server on CentOS 7, Postfix and
Dovecot. We get quite a lot of spam, so I have the following sender
restrictions in my /etc/postfix/main.cf:
--8<------------------------------------------------------
# Restrictions SMTP
smtpd_helo_restrictions = reject_unknown_helo_hostname
smtpd_sender_restrictions = reject_unknown_sender_domain,
2012 Feb 02
10
postfix - reject of incoming mail due to helo check??
Hi list,
I have been getting the following types of log messages
Jan 30 08:22:33 ndgonline postfix/smtpd[30538]: NOQUEUE: reject: RCPT
from unknown[71.46.229.50]: 450 4.7.1 Client host rejected: cannot find
your hostname, [71.46.229.50]; from=<DWoodman at orangebankfl.com>
to=<rkampen at ndgonline.net> proto=ESMTP helo=<mail.floridianbank.com>
a rdns check shows all is well
2010 May 21
1
question about scripts sieves
hello list
hello dovecot network
hello all the reader
here is a sieve script
this
########################################
require
["fileinto","regex","comparator-i;ascii-numeric","reject","relational"];
# rule:[spammanage]
if header :value "ge" :comparator "i;ascii-numeric" ["X-Spam-score"]
["500"] {
2016 Jan 07
3
Helo Checks not always working?
All i have is :
smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated
I disabled the unknown restriction due to lots of customers of me are missing PTR records, which needs to be set bij the internet provider.
So they got blocked, i had to remove these.
The Helo check is often on the IT department can adjust them selfs.
And most spammers have incorrect helo’s
2013 May 02
1
Tuning!
Hi Buddies,
I have 2 servers running dovecot + postfix for pop/imap users.
The users mailbox are in a Nfs storage.
The load of server is ranging at 3.0 to 15.0.
I really dont know what happened.. I read a lot about tuning of dovecot,
and the changes are applied, how you can see.
The Hardware of server is really good!
The host have 8GB of mem and 2 sockets with 2 cores anyone.
The server receives
2010 Nov 16
2
Postfix - message queue filling with Host or name not found - try again
Hi list,
I have noted over the last week or so my DNS servers are dumping lots of
messages for bogus domain lookups. Examining the postfix queue with
postqueue -p: I see many
(Host or domain name not found. Name service error for
name=bdgiedjhea.po6e4ina.com type=MX: Host not found, try again)
Jake at bdgiedjhea.po6e4ina.com
My question - why does this
2012 Mar 12
3
postfix and spam, I am impressed
I have had the same email address since 1997 (when microsoft stole
bob.com from me thanks to network solutions...)
In the early days I of course was free with my email and used it everwhere.
Fast forward to 2012, some 15 years later.
woof..the amount of spam sent to me has always just kept getting worse
and worse.
On my centos 5 server I just used sendmail with spamassassin and it
killed a
2019 Dec 29
1
Dovecot Postfix MySQL Authentication Issues
I am I a situation where I have to wipe my remote server and reinstall, Its been a while since I built a server and I am not as sharp as I use to be
I am running FreeBSD 12.1. well at least the server is... I am getting constant authentication errors like
Dec 28 22:10:18 triggerfish dovecot[21809]: imap-login: Aborted login (auth failed, 1 attempts in 6 secs): user=<jason at example.com>,
2012 Jan 13
2
Using Dovecot-auth to return error code 450 (or other 4xx) to Postfix when user is on vacation
Hello to all members.
I am using Dovecot for 5 years, but this is my first post here.
I am aware of the various autoresponder scripts for vacation autoreplies (I am using Virtual Vacation 3.1 by Mischa Peters).
I have an issue with auto-replies - it is vulnerable to spamming with forged email address.
Forging can be prevented with several Postfix settings, which I did in the past - but was forced
2010 May 26
0
with dovecot deliver amavisd not work
hello all reader
hello list
hello centos network
since I've installed dovecot deliver. e-mails no longer pass through
amavisd.
amavisd no longer work.
c is to say I have no anti-spam and anti virus
my postconf and dovecot -n
[root at r13151 ~]# postconf -n
alias_database = hash:/etc/aliases , hash:/etc/postfix/aliases
alias_maps = hash:/etc/aliases , hash:/etc/postfix/aliases
body_checks =
2010 May 26
1
with dovecot deliver amavisd not work
hello all reader
hello list
hello dovecot network
since I've installed dovecot deliver. e-mails no longer pass through
amavisd.
amavisd no longer work.
c is to say I have no anti-spam and anti virus
my postconf and dovecot -n
[root at r13151 ~]# postconf -n
alias_database = hash:/etc/aliases , hash:/etc/postfix/aliases
alias_maps = hash:/etc/aliases , hash:/etc/postfix/aliases
body_checks
2019 Apr 26
2
How "safe" is reject_unknown_helo_hostname?
Helo hostname MUST have resolvable hostname.
Crazy or not, but i use this.
The _access-allow parts for server you really trust.
smtpd_client_restrictions =
permit_mynetworks,
reject_unauth_destination,
check_client_access cidr:/etc/postfix/check_client_access-allow.cidr,
reject_unknown_hostname,
reject_non_fqdn_hostname,
reject_invalid_hostname,
2008 Jun 29
2
spam filtering with centos 5.2
In the past I've used a combination of spamhaus combined RBL's and
Spamassassin with Mailscanner as my spam recipe, but this stopped
working very well for me well over a year ago. As many of the users of
the couple small/personal mail servers I run are NOT technical people,
and use POP to read their mail, 'training' spamassassin is difficult at
best. Once upon a time, using
2016 Jan 07
0
Helo Checks not always working?
Yes !! you totaly right..
When i make it, its gone within 1 month, the new mail setup is ready, and tested, only the migration todo ...
But first snowboarding again next week.. :-))
Greetz,
Louis
> -----Oorspronkelijk bericht-----
> Van: samba [mailto:samba-bounces at lists.samba.org] Namens Rowland penny
> Verzonden: donderdag 7 januari 2016 15:00
> Aan: samba at
2010 Oct 20
8
anti-spam+anti-malware suggestions
Hello people,
I am using now qmail in cluster with LDAP + Interscan Messaging Security
Suite from Trendmicro.
I need to develop a new solution with:
- postfix
- dovecot
- anti-spam
- anti-malware.
I am thankful any help or suggestion for anti-spam and anti-malware.
Thanks in advance!
--
:) cumprimentos
----------------------
Jos? Lu?s Faria
Network Eng./Administrador de
2019 Jun 19
4
Postgrey not working
Hi,
I have a working installation of Postfix and Dovecot that works nicely.
I've added SpamAssassin, which does a good job of flagging spam. Now I
wanted to add greylisting to my server.
Here's what I did.
$ sudo yum install postgrey
Increase the greylisting delay.
# /etc/sysconfig/postgrey
POSTGREY_OPTS="--delay=300"
Edit /etc/postfix/main.cf accordingly.
2006 Oct 25
11
spam control
Gents,
I have added the following to /etc/mail/sendmail.mc and rebuilt it
trying to control spam. I still get about 25 spam messages a day.
Is there something else that can help control spam?
Thanks
jerry
---------------------------
dnl #
dnl # dnsbl - DNS based Blackhole List/Black List/Rejection list
dnl # See http://www.sendmail.org/m4/features.html#dnsbl
dnl #
FEATURE(`dnsbl',
2009 Mar 13
1
Postfix smtp_recipient_restrictions causing mail to fail
Hi All,
I'm currently playing with smtp_recipient restrictions to try and knock
some of this spam on it's head. On my old debian server, I was using
this and successfully filtering out at least 90% if not more of all spam
emails which was great. I didn't even need spamassassin.
However, trying to do the same thing on my new CentOS based server isn't
working. With the
2014 Sep 22
1
sieve redirect to foreign email gets “Relay access denied”
I have a postfix mail server with sql authentication and I want to
implement sieve on it.
Sieve is working relative good, rules who contain 'fileinto' are
executed perfectly.
The problem is the redirect to other servers.
I configured a rule in Sieve to redirect any email containing "redirect"
in subject to a specified foreign destination. #
So practically a email coming from
2008 Aug 31
1
Howto: postfix_restrictions
Hey Ned,
I found this very useful to test that the RBL was working:
http://www.spamhaus.org/faq/answers.lasso?section=Spamhaus%20SBL#207
"
How do I test my SBL setup?
Once you have set up your mail server to use sbl.spamhaus.org (or the preferred zen.spamhaus.org), you can test to see if the SBL blocking is working by sending an email (any email) to: nelson-sbl-test at crynwr.com