Unsolicited e-mail, comments or posts, often sent out in large volumes; possibly but not necessarily commercial in nature

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2answers
1k views

Use postfix and spamassassin packages on CentOS 6 to reject SPAM - without custom users and scripts

Here is what I'm trying at my CentOS 6.5 Linux server: Installed postfix and spamassassin packages Configured Postfix - it works well (I omit details here) Added -x to the SPAMDOPTIONS in ...
1
vote
1answer
86 views

create safe sender list based on domains of email recipients in Exchange

We're moving from Google Postini to Symantec Cloud as a spam filter. In Postini we've managed to collect a total number of about 3400 domains added over the years to our safe sender list. But ...
1
vote
1answer
146 views

Spam - individual user

I have a bit of an issue with a users inbox in that a lot of spam is getting through for him alone. We use Amavis/Postfix and SA in our mail setup. Config setup like this: Config: ...
5
votes
1answer
296 views

Disable Outlook Web Access Junk filtering in Exchange 2013

By default, Outlook Web Access (OWA) in Exchange 2013 seems to move suspected junk mail to the Junk Email folder. This is undesirable behavior in most of my environments because we have Barracuda Spam ...
1
vote
1answer
118 views

Postfix message ID originating process?

Last night my postfix mail server(Debian Squeeze with dovecot, roundcube, opendkim and spamassassin enabled) started sending out spam from a single domain of mine like these: $cat mail.log|grep ...
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votes
1answer
40 views

No way to create an effective spam filter [duplicate]

We are having a big spam problem and we don't know how to resolve it. We have one spammer that send us mail daily. All these emails are from different themes, using different email addresses that are ...
0
votes
1answer
53 views

How do I block a user doing too many requests without blocking an entire organization?

We have a running website and some of the content comes from a paid API. Our website is free. Our main concern at the moment is people using our website as a "free" way to get at the underlying data ...
0
votes
1answer
132 views

Spam Traffic, DDOS Attack & Server Crashing

I am running phpfox application in my server under my main domain name fetlock.com and I am getting large amount of spam and also suffering from DDOS attacks from multiple IP addresses. My server ...
0
votes
1answer
36 views

SpamAssassin doesn't filter forwarded mails

I am forwarding emails from an external email account to an account on my own server. SpamAssassin works fine if I just receive mail normally. But all mail thats being forwarded from my external mail ...
1
vote
2answers
379 views

exim4 reveals a mail alias when remote server rejects spam

I'm running exim4 (4.76) on Ubuntu 12.0.4.4. exim4 is set up to handle mail for mydomain.com. I have aliases set up that forward a@mydomain.com to b@gmail.com. I have SpamAssassin set up to work in ...
0
votes
0answers
113 views

Forwarding email through a dummy relay to avoid blacklisting

I have a mail server that allows individual users to forward mail to other providers. The server performs the usual anti-spam checks, but spam still gets through occasionally -- especially with the ...
-2
votes
2answers
668 views

ubuntu postfix send mail marked as spam [duplicate]

I set up a mail server, when I give Gmail to send test message is marked as spam system: ubuntu + postfix + dkim + dk + spf + ptr This is the message header Delivered-To: test@gmail.com Received: ...
1
vote
0answers
115 views

Spamassassin && Exim: redirect spam emails

I want to redirect all email, being marked as SPAM to special mailbox. Works with Exim4, SpamAssassin Server version 3.3.1 on CentOS 6.5. Rules from Exim in acl_check_data block: warn message = ...
1
vote
1answer
267 views

Server sending spam - how to find out why?

I have a CentOS 6 on a dedicated server. I'm the only one with shell access to it. I host 2 Wordpress and few simple PHP sites there. My hosting company just emailed me that they blocked my port 25 as ...
0
votes
2answers
86 views

Prevent abuse of sendmail for spam

In web servers that host many websites there is always the possibility of a hacked site being abused in order to send spam mails with some kind of php mailer bot. In my case sendmail is configured ...
0
votes
2answers
120 views

Error sending emails from a mail server relay type falling into the spam folder (using postfix)

Here I show one of the emails that come to Yahoo, which are falling directly into SPAM folder. The SPF goes smoothly, the DKIM passes without problem, even DMARK passes without problem, but just keep ...
0
votes
2answers
862 views

Postfix and Dovecot Sieve spam filter does not work

CentOS 6.5 x64 I'm trying to apply a Sieve filter to my mailserver (Postfix + Dovecot + Spamassassin) to automatically move spam mails to my Junk folder. I've added sieve to my ...
0
votes
4answers
188 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 ...
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votes
1answer
142 views

Prevent postfix sending spam from fake local address

I have an email server Postfix (not open relay) filtered with ASSP (filter incoming mail/connection), but some spammer is sending tons of spam using my email server by using fake local address. This ...
0
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0answers
21 views

It's possible to have a Distributed Bogofilter database?

We've Bogofilter running on our AntiSpam system and I would like to distribute it's database through the two MX gateways that we have. I know it's possible using SpamAssassin with a shared MySQL ...
11
votes
2answers
688 views

How can I reduce the damage of stolen mail accounts?

Currently I’m offering some webhosting to a few advertising agencies for their premium customers. But currently I have a great problem with the E-Mail Service. In the last week, the E-Mail Accounts of ...
1
vote
2answers
150 views

Quick/safe way to mass delete SPAM messages from 100+ inboxes

Looking for a way to delete all messages from particular senders out of every affected users mailbox, typically 100-200/10,000. When I approached our Exchange admins about this idea I was met with ...
0
votes
0answers
52 views

Global Inbox Rules in Exchange 2013

There's a way to create global inbox rules in Exchange 2013? I'm not referring to the Transport Rules, because it does not perform what I would like to. It would be nice to force a Inbox Rule, ...
0
votes
0answers
201 views

How to send emails without ending up in Junk/Spam folder

I have installed a mail server in order to send e-mails using my own domain name. I've read many articles about how not to end up in Junk folder. I have done what those articles said: Added MX ...
2
votes
0answers
94 views

Restrict IMAP access for a given account to only one IP address in Exchange 2013

I've created a "spam crawler" account with full access to all mailboxes in an Exchange 2013 environment to get messages in the junk folder to feed the Bayesian filtering running on SpamAssassin in a ...
1
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0answers
70 views

Email spam/hack and odd apache logs around the same time

A friend of mine started getting failed delivery notices yesterday (June 23rd, 2014) on all of his domain e-mails, and so he asked me to look into it. I have been looking through various logs and his ...
2
votes
0answers
103 views

Single MailCleaner installation for two distinct domains with user authentication

I would like to use one MailCleaner installation to handle two distinct domains as one centralised spam management system, sharing configuration and mainly the bayesian filtering database. Both ...
7
votes
3answers
2k views

Should I let email bounce or send it to a blackhole?

I have a lot of unused (old, dead) accounts on my machine. Many of them receive literally thousands of emails a day, all spam. If the account was used by a person, I let the email bounce so that ...
2
votes
2answers
58 views

Sending mail from sub-domain on different server from domain getting flagged as spam

Our client owns a server with a domain: website.com We have a server that our client points videos.website.com to. Emails sent from videos.website.com are getting flagged as spam because website.com ...
0
votes
1answer
176 views

Plesk 12 Linux Server Mail Spam Issue [on hold]

I'm running multiple websites on my dedicated server, and for one website in particular where users signup and then must verify their email address, I'm getting reports from my client that a small ...
2
votes
1answer
2k views

Postfix: Gmail marking my email as spam

I'm been trying to understand why Gmail is treating the email sent from one of my domain/server as SPAM. I found a lot of threads here about this issue, however I checked the usual suspects like ...
0
votes
1answer
1k views

Block Outgoing SMTP Except for Mail Server

Masters, Our ISP ask to solve a problem. They said we send many SPAM from our server. (they only give our router IP address, so we don"t know if we have SMTP flooders from infected cllient, our we ...
0
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0answers
53 views

How to check why SpamAssasin Bayes filter not working?

I have exim 4.77 with spamassasin 3.4.0 on Debian, I identify spams by myself and send to sa-learn, which seems working. But I have never receive spamscore by Bayes, I check the emails which ...
0
votes
1answer
68 views

Distinguishing spam from google servers

I run a very good anti-spam setup, except for one nagging little problem: Google. Some legitimate users use Google's mail service with custom mail domains. In other words, they do not use a ...
0
votes
3answers
603 views

Server being used to send spam mail. How do I investigate?

Problem I think my server is being used to send spam with sendmail, I'm getting a lot of mail being queued up that I don't recognize and my mail.log and syslog are getting huge. I've shutdown ...
0
votes
1answer
81 views

PermError SPF Too Many Lookups and Reduction

My current SPF record is as follows: v=spf1 mx include:servers.mcsv.net include:xero.com -all The above cause the SPF validation to fail. Using http://mxtoolbox.com/SuperTool.aspx?action=txt, I ...
1
vote
2answers
492 views

Postfix sends email to spam (gmail, hotmail)

I recently installed a postfix + dovecot + dkim multi domain, multi user, multi alias mail server on my debian squeeze system. Everything works except for one big issue that basically makes the whole ...
0
votes
0answers
584 views

553-Message filtered - HELO Name issue?

I am having major issues sending from my SBS2011 machine to Message labs server-13.tower-134.messagelabs.com #553-Message filtered. Refer to the Troubleshooting page at ...
2
votes
1answer
565 views

How to setup a daily report of the top e-mail senders in Exchange 2010

We have had issues with compromised Exchange accounts sending a large amount of unsolicited e-mails out. We have mitigated this by using a cloud e-mail gateway that does a better job in detecting ...
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votes
1answer
240 views

How to find the source of outgoing SPAM emails on my Server [closed]

Hello this is my first time here. I do know a little about linux but I can't seem to find out the source of tons of SPAM emails being sent out on my server. Here is a small portion of the QMAIL ...
0
votes
1answer
352 views

How to find out where mystery SPAM scripts are coming from?

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 ...
1
vote
1answer
1k views

Exchange 2010 email spoofing prevention

Masters, Unfortunately we got some spam mail which seems to be coming from our own domain. I found some article which all says to remove Anonymous login from internet receive connector ...
-2
votes
1answer
5k views

Mail delivery failed for a message I didn't send [duplicate]

I have started to receive emails with the subject: "Mail delivery failed: returning message to sender" for emails I haven't sent. I host my own mail server at my domain matos-sorge.com (a linode) and ...
0
votes
1answer
1k views

GMail sends basic email to spam folder. SPF DKIM ok? [closed]

I am trying to send an email from my server using Mailgun. It's a very basic plain text email but for some reason it is ending up in spam. SPF and DKIM passes. Any ideas? I don't have any clue. This ...
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votes
1answer
194 views

Postfix user is not allowed to submit mail

I am running a webserver on debian wheezy with postfix and about 3 months ago I had a major spam problem with one my domains with web21 id. I made a fresh wordpress install and everything and the ...
8
votes
1answer
195 views

Is there a way to get spamassassin to score the top lines of a message body more heavily?

A lot of spam is getting through the filter on the mail server I run with the relatively simple trick of starting with few lines of (incredibly obvious) weight loss or other scam text at the top, ...
0
votes
1answer
69 views

Spam e-mail tracing

I have this issue where I receive on my server admin e-mail failure notices to a lot of e-mails that I or my hosted domains did not send. The machine is an Ubuntu with Plesk 11. For e-mail I use ...
0
votes
1answer
118 views

Project Honeypot says my mail server has become a spammer [duplicate]

I need help diagnosing this: http://www.projecthoneypot.org/ip_66.18.204.186 It says my server has been sending spam for 4 months! I try to be a responsible mail server admin, I hate spam, I do ...
0
votes
1answer
48 views

Should I block the other SMTP ports as well to block outgoing mail?

I have blocked outgoing port 25 to prevent spam being sent from my servers. However, I'm not very familiar with SMTP and I have heard that ports such as 465 and 587 can also be used to send mail, but ...
0
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0answers
865 views

Exchange 2010 Mail stuck in Queue - HUB Version 15 - Journaling

I have issues with my queue on my Exchange 2010 Hub Transport server. When I do a Get-Queue, I can see over 1000 emails on queue and the next hop is Hub Version 15! I don't have a clue what a Hub ...