All Questions
25
questions
0
votes
0
answers
7
views
Why does the SpamAssassin not insert some headers?
Trying to configure SpamAssassin 4.0.0 with Postfix 3.7.10 on Debian 12. I'm using spamass-milter 0.4.0. My /etc/spamassasin/local.cf has the following entries:
required_score 5.1
...
- 1
0
votes
1
answer
178
views
Debian 10.4 / Exim 4.92 add incremental delay to the unsuccessful login attempt answer
Browsed over all the internet, but cannot find an answer. Is there any acl or something that I could apply to unsuccessful login attempt to add delay to it? As probably anyone running mx, I have a lot ...
- 155
0
votes
1
answer
92
views
Linode (Debian) box with multiple web apps - is it possible to send emails from multiple domains via sendmail?
I have a Linode instance in which I'm going to host several small-ish LEMP apps. Each of these apps need to send emails to users (mostly for account registration... forums/comments and whatnot). I'd ...
1
vote
0
answers
45
views
Reject email if From address matches and if content matches as well (Postifx)
I'm trying to setup a rule in my postfix configuration where I check the from address and the email content.
My idea is to REJECT mail if:
From: [email protected]
Content: Hello Test
Is there anyway to ...
- 131
0
votes
0
answers
707
views
How to block email if sender doesn't match reply-to address? [postfix]
Currently our company is getting more and more spam. For a small company we had to block all incoming spam from chinese IPs, which blocks around 500 spams per week which is alot, as we're a local ...
- 131
0
votes
1
answer
2k
views
Prevent intruders to send emails from myself (Postfix)
recently we have been victim of a simple phishing.
Yet simple but it can be scary for some users, I don't know how to block this.
The intruder connects via telnet to our mail server and sends ...
- 131
-1
votes
1
answer
126
views
One of my mailboxes sends a huge amount of spam to gmail and yahoo addresses. Cannot stop it
I'm stuck in here. I'm using ISPConfig on a Debian Wheezy Postfix mail server, and I have the following problem:
I have multiple mailbox addresses on 14 domains. One of the addresses started 2 days ...
0
votes
1
answer
86
views
Postfix: Recieving mails that are not for my domains
we are using postfix/dovecot/amavis/spamassassin configuration with custom SA rules, etc.
But some weird mails are delivered to us, even without spam test headers and dkim tests
Example header:
...
- 1
0
votes
2
answers
8k
views
spamassassin has false-positives with emails originating from dialup addresses
I'm mostly a happy admin of spamassassin (3.4.0-6) + exim4 (4.84.2), setup for server-side spam-filtering on a Debian/jessie system.
Recently a user reported some false positives.
On closer ...
- 519
0
votes
1
answer
505
views
Mail sent by Postfix / Dovecot setup going into spam folder
I am running a Debian 8 VPS for a couple of months now. I running several services, including a mailserver with Postfix and Dovecot.
As far as I can tell, I have everything set up correctly.
My IP is ...
- 171
1
vote
0
answers
34
views
How I can look from that script runs sendmail? [duplicate]
my problem is that some script in php or some other script or program is sending spam.
I am not able to trace where this program runs.
do the following:
ps aux | grep sendmail
nginx 28286 0.0 ...
- 127
0
votes
2
answers
588
views
Postfix sent mails are bounced or go to spam
I recently tried setting up a mail server to be able to send mail for the websites I host with apache.
At first I tried to work with exim but I was overflown with error messages and mails I tried to ...
- 161
0
votes
1
answer
124
views
Email in SPAM with Debian 8.2 [duplicate]
I have a problem (BIG PROBLEM) with SPAM.
All the emails my mail server (Debian 8.2 and ispconfig latest stable) send, end up in spam. I'm using Google Apps.
I did a test on spamscorechecker.com ...
- 11
-2
votes
2
answers
319
views
Mitigating spam on Linux server where all MTA's (Postifix, PHP Mail() function) etc. are disabled [duplicate]
We have a Debian Squeeze server running a fairly standard LAMP stack (back in the days it was set up using the Perfect Server guide at Howtoforge, so we're using ISPConfig as our backend admin panel) ...
- 75
-1
votes
1
answer
153
views
Spam sent from my domain after a Wordpress exploit [duplicate]
I have 2 domains on my dedicated server running debian.
One of them is linked to a wordpress site, mydomain.com.
I've noticed that on both my sites, lately, the performances were horrible so I ...
- 131
0
votes
2
answers
1k
views
Why does my server (postfix) "relay" mails / Have my server been hacked? [duplicate]
Something weird is going on on my mail server.
I was mailing a friend and my mail bounced because the ip of my server had been blacklisted.
It appears like my server is being used for relaying spam ...
- 3
0
votes
4
answers
923
views
Create IP nullroute blacklist from text file
I've seen various guides out there for how to nullroute a single IP address, and I've done that before. However, I'm not sure how to nullroute a group of IP addresses. Going through each one ...
- 111
0
votes
1
answer
1k
views
How to find out where mystery SPAM scripts are coming from? [duplicate]
I am the datacenter manager at a small ISP and we have been having an issue with mystery scripts sending out SPAM on our server. These PHP scripts will appear mysteriously in /tmp as well as sometimes ...
- 103
1
vote
1
answer
1k
views
what user is sending emails from mailq
I have a debian box with postfix on it.
I checked the mailq and I do not understand how to read the mailq.
I need to know witch user is used to send this emails.
here is a example
0F87797868C ...
- 347
0
votes
1
answer
1k
views
Someone used my postfix smtp (port 25) to send spam mails to me
This week, someone started to send spam-mails through my postfix-smtp access (I verified by logging in through telnet from an arbitrary pc and sending mails with any ids myself) on my server, with ...
- 201
2
votes
1
answer
2k
views
Config Server Firewall: Spamming my email | lfd on localhost: Suspicious process running under user www-data
I have just installed and configured CSF and I am getting 100s of spam emails containing this message.
lfd on localhost: Suspicious process running under user www-data
Time: Wed May 23 01:05:52 ...
- 388
0
votes
1
answer
1k
views
My debian server is sending spam, and I don't know why :(
I got my first dedicated server a couple of months ago, using it to learn Linux and server admin, and to host a couple personal sites. I'm very new to Linux, so I used examples and tutorials found ...
- 115
0
votes
1
answer
136
views
Figuring out spam source
Few months ago, my host reported spam going from one of the 3 ips on our server. The host null routed the ip and all was good. We didn't have anything hosted on that ip so it wasn't a big deal.
The ...
- 1
30
votes
4
answers
12k
views
Prevent mail being marked as spam
This is a canonical question about avoiding outgoing mail being classified as spam.
Also related:
Fighting Spam - What can I do as an: Email Administrator, Domain Owner, or User?
What ...
- 405
4
votes
2
answers
2k
views
Best Postfix spam RBL policy weight daemon?
I just heard about policyd-weight so I did an apt-cache search policyd which returns three options:
policyd-weight
postfix-policyd
postfwd
Which one is the best, and do you have any tips on setting ...
- 2,569