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

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11
votes
10answers
2k views

Using fake MX records to combat spam

I have a client that is getting heavily spammed.. It's the 15th of the month and POP3 bandwidth is almost 100 GB. There are only 7 e-mail accounts on this domain. I installed SpamAssassin set it to 5 ...
1
vote
3answers
2k views

How to block this URL pattern in Varnish VCL?

My website is getting badly hit by spambots and scrappers. I've used Cloudflare but the problem still remains there. The problem is spambots accessing non-existing urls causing a lot of load to my ...
0
votes
1answer
37 views

Block SPAM IP addresses [on hold]

Short version: Can I do something on the server side to prevent IP addresses detected as malicious from third party projects from consumpting my resources? Long version of the question: Hi, I have ...
-1
votes
0answers
10 views

Spam in server using EM Client

In em client, I added a rule that will delete the spam permanently. Now, my question is, will it still be listed in our server or the spam message will not be included in the list?
3
votes
1answer
56 views

Why am I getting these emails?

Awhile ago I noticed that email messages from my domain is not immediately delivers by google, and I'm getting an smtp error message from google server. I don not remember the exact wording of that ...
0
votes
2answers
80 views

opensource feedback loop implementation for email and webmail integration

I would like to find out if there is an opensource software that implements the Feedback Loop. I will try to be more specific. I want my clients to have the ability to report a message as spam and ...
4
votes
5answers
9k views

How do I get my server off the ivmSIP/24 blacklist?

I checked my server IP using this tool: http://www.mxtoolbox.com/SuperTool.aspx It's come up on the ivmSIP/24 list. What can I do to get my IP removed from this list? I have SPF records set to ...
-2
votes
0answers
17 views

Gmail - Outgoing emails rejected as spam [duplicate]

I've been running Gmail / Google Apps for a client for about 6 months now. Initially, everything ran smoothly but for 2 days now various users have had emails rejected due to the target servers ...
0
votes
1answer
3k views

Plesk 11 Set firewall rules manually [on hold]

I have a big spamming problem on my site from ip addresses coming from Asia. My website is designed for people in France and Canada, so I want to block all ip addresses from Asia to avoid spam. I ...
-3
votes
2answers
53 views

Remove blacklist from spamRATS

I have checked my IP in SpamRATS and the result is the following: Standards Compliance: Does IP Address resolve to a reverse hostname... Passed! Does IP Address comply with reverse hostname ...
0
votes
0answers
12 views

Blacklist mail server [duplicate]

I have checked my IP in all spam lookup sites. those sites are DNSBL.info, spamhaus.org, barracudacentral.org, spamcop.net, blacklistalert.org and all of it says that I am clear. But when I checked it ...
0
votes
0answers
19 views

How to flag email rated with negative Spam score as actual Spam?

I'm being inundated with spam email, seemingly overnight. 200+ messages a day, easily. After looking at the headers, the majority of the messages have spam score numbers in the negative range. ...
-2
votes
1answer
39 views

Individual accounts being spammed on server, even though DNS not hosted [closed]

Disclaimer: Please pardon the newbery! I've got a dedicated linux server from HostGator that has around 100 accounts on it. Lately, dozens of these accounts get bombarded with junk mail a few times a ...
20
votes
3answers
1k views

What are the best methods for catching snowshoe spam?

I'm using Smartermail for my small mailserver. We've been having a problem lately of getting waves of snowshoe spam that follow the same pattern. They come in batches of 3 or 4 at a time. The ...
-1
votes
2answers
36 views

Postfix, I'm receiving a lot of undelivered mails (logs inside)

Some days I receive a lot of Undelivered emails, it's like my server is used as relay. But I don't know if that's only backscatter emails or my server is really used as a relay. Here is what I found ...
0
votes
1answer
176 views

Plesk 12 Linux Server Mail Spam Issue [closed]

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 ...
-1
votes
0answers
14 views

postfix mail server spam allboutspam SPAMAssassin batv [closed]

i have 64bit centos server with postfix service with virtualmin panel i checked my website with allaboutspam.com and most test is green, one is yellow and one is red . yellow error how can i fix ...
51
votes
6answers
14k views

Fighting Spam - What can I do as an: Email Administrator, Domain Owner, or User?

This is a Canonical Question about Fighting Spam. Also related: How to stop people from using my domain to send spam? What are SPF records, and how do I configure them? There are ...
1
vote
2answers
41 views

My site is suddenly getting slammed, not legitimate traffic

I run a site with about 700 registered users. On a typical day, there are 30-50 hits. In the last three days, the traffic has increased insanely fast (according to Google Analytics). I got 7,287 hits ...
0
votes
2answers
4k views

cPanel Server Email to Gmail marked as Spam, SPF, DKIM, and rDNS pass

Having this issue on a cPanel server 11.34.1 that hosts multiple domains. Email originating from this box on the sendingdomain.com address is flagged as Spam by Gmail. I've implemented SPF and DKIM, ...
0
votes
1answer
157 views

Security Risks of catch-all email address [closed]

What additional security issues does an MTA and email client face if a catch-all email address is setup on an sub-domain (that isn't published/publicly listed anywhere) compared with setting up ...
0
votes
1answer
42 views

moving emails on cPanel or plesk to specific folder based on tag [closed]

I have hosting servers with cPanel and Plesk, which have more than 1000 customers. I want that when any email is marked as spam, then it should be moved automatically to JUNK folder, instead of ...
-1
votes
0answers
17 views

Mail services disabled but server still sends spam [duplicate]

A domain on my host was sending spam e-mails. It was an outdated joomla version and there were everywhere in their web directories php bot spam scripts. From my side I disabled the php's mail() ...
0
votes
1answer
160 views

Getting lots of traffic from russia to an unpublished site

I am currently building a website. Currently nobody knows about it but it is already reachable for testing purposes. Now I saw, that I get a lot of traffic from russia (Its a german website hosted on ...
2
votes
1answer
5k views

Exchange 2003 mail non-delivery (NDR), spam activity? events 7002 & 7004

Windows Server 2003 Small Business Server SP2 Exchange Version 6.5 (Build 7638.2: Service Pack 2) This network has been neglected and has been having email problems for years and was on many ...
0
votes
2answers
48 views

AOL bounces with: AOL will not accept delivery of this message [closed]

AOL started bouncing emails from my mail server with the following error: 521 5.2.1 : AOL will not accept delivery of this message. 554 5.5.0 Remote protocol error On the troubleshooting page AOL ...
0
votes
0answers
10 views

getting lots of spam from “unknown” and helo localhost [duplicate]

On our server, we keep receiving spam with the following headers. We are using whm 11.44 and exim. Return path is always: Return-path: <> and it says Received: from unknown (HELO localhost) Both ...
8
votes
4answers
12k views

How does a Reverse DNS lookup work with regards to spam filters?

I have heard that most spam filters use a reverse DNS lookup on the originating IP address of the sending SMTP server (or something like that) as part of the verification process. I want to make sure ...
0
votes
0answers
45 views

Information to keep in a spam black/whitelist

Assuming that I want to black/whitelist specific messages as spam/not spam, what message/sender info should I collect in that blocklist? The address will be most likely faked so I assume the 2 ...
2
votes
1answer
98 views

Can someone explain SMTP Callbacks when BATV is enabled, and when to issue the verification?

This Wikipedia article describes how SMTP verification of the MFROM may have issues if BATV is enabled. Servers that reject all bounce mails (contrary to the RFCs). To work around this problem, ...
0
votes
2answers
88 views

Postfix 2.9 or sendmail, outgoing spam prevention (check if sender exists)

Operating System: Linux Ubuntu 12.04 TLS Context: Plesk 11.5 Utility: Postfix 2.9.6 (updates restricted by Plesk 11.5 distribution) I would like Postfix to check the 'sender' field of every ...
0
votes
6answers
1k views

Email sent, but recipients do not receive it?

I have been struggling for this issue for months. I have a website, that the registration requires email authentication. I did a check (daily), the statistics are quite interesting. Everyday, out of ...
0
votes
0answers
22 views

What is the best way to filter this specific message as spam? [migrated]

I use my own rules to filter spam emails. I use Alpine email program. Consider the following header of a recent spam email. What are the best way to write a filter to mark this email as a junk in such ...
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
78 views

How can I avoid being classified as spammer when I forward mail to a gmail account? [duplicate]

Update: The link pointed to by the "duplicate" initially didn't seem like the same problem to me, because the post talked about blacklisted "domains" not blacklisted "IP addresses." However the main ...
0
votes
0answers
11 views

SCL not available for single user

Recently migrated from Exchange 2003 to Exchange 2010 with Edge server. Problem is: All incoming mail for one specific user bypassing Mail Content Agent checks, there is a record from logs: ...
-2
votes
0answers
24 views

Setting up SMTP correctly [duplicate]

I've created a mailbox on my VPS, using CentOS and Virtualmin. But all mails that I send go to trash. I've used http://mxtoolbox.com/ and from what I understand it goes to the trashmail because of a ...
6
votes
13answers
7k views

Relatively easy way to block all traffic from a specific country?

I know this sounds terrible, but I have a web app that has no users in the Philippines, but is constantly bombarded by spammers, carders testing cards, and other BS from there. I can see in the logs ...
3
votes
1answer
80 views

Configure Barracuda Spam Filter behind Postfix to use client IP when do RBL-checking

I have the following setup: Internet -> Postfix Mail setup as Proxy -> Barracuda Spam Filter -> Microsoft Exchange I have tried searching through the documentation and configuration panels to see ...
1
vote
1answer
2k views

Any way I can send Spam to my mail perimeter in a controlled way for testing?

I just set up a Postfix/Procmail/SpamAssassin server but I am not convinced that it is really doing much filtering. I have gotten it to recognize the SpamAssassin special Spam code that produces a ...
0
votes
1answer
194 views

How to configure SPF and DKIM to prevent mail going to spam folder

When creating a mail with PHPMailer my emails are getting sent to the spam folder of my recipients mailbox I have been told I need to configure my SPF and DKIM correctly, I think I have done this ...
-1
votes
0answers
14 views

Sending email to a group that doesn't look like spam [duplicate]

I work for a small non profit that assists high school and college students and their families. We communicate with our constituents primarily via email. The emails contain program information and it ...
1
vote
1answer
63 views

Postfix mail sent to SPAM in Yahoo and Outlook (SPF, DKIM, DMARC also configured)

I have implemented DMARC in out email server and got the response from some of the email domains as follows, <?xml version="1.0"?> <feedback> <report_metadata> ...
0
votes
1answer
28 views

Spam Firewall for Exchange 2013 Environment

We are currently using Exchange 2013 and we are interested in the Barracuda Spam Firewall. We are trying to figure out a way around our current email flow setup. We currently have multiple users with ...
3
votes
1answer
53 views

How to deploy separate DNS server for email filtering

I'm looking to install Vamsoft ORF as a spam filter for my domain. Looking at the Deployment Guide I've noted the following statements regarding DNS. The server should not be the same DNS server ...
2
votes
2answers
59 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 ...
1
vote
2answers
72 views

Users accessing our email when traveling overseas are seeing strange SPAM behavior

I run technology for an international non-profit, so I have users that could be checking their email from Pennsylvania one day, Santo Domingo the next, and Kabul, Afghanistan, the next week. Recently, ...
16
votes
3answers
1k views

Is my new gTLD causing it to get filtered as spam?

I have a domain called "*******.international". I decided to go with the new gTLD because it fits the name of the company pretty well. I have an automated emailer setup to send emails to our clients' ...
-1
votes
0answers
40 views

Postfix SMTP mail is sent to SPAM

I have installed postfix mail server in ubuntu machine. I configured the mail server as well as DNS properly. Mails are sent from our mail server properly, but all the mails are listed in the spam ...
2
votes
1answer
203 views

Does the Anti-SPAM filtering in SmarterMail work on the Distribution Lists?

I have a few distribution lists running in "Subscriber Only" mode, meaning that only somebody who is subscribed to the list (or on the Whitelist) can post to the list. Some spammers have discovered ...