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0
votes
4answers
65 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 ...
9
votes
2answers
654 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
0answers
15 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
30 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
1answer
66 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 ...
-1
votes
1answer
188 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 ...
1
vote
0answers
98 views

How can I test if my apache server is an open proxy?

Is there a curl command that will validate if a server is acting as an open proxy? I've tried curl --proxy http://<my server>:80 http://yahoo.com But the response from apache is: ...
0
votes
0answers
23 views

Prevent email spam from vhosts

We have a server with several vhosts (with php) running. Recently one vhost was overtaken from a "hacker" which manipulated the php scripts to send email spam. Because the other email servers blocked ...
0
votes
1answer
337 views

Filter spam emails from being forwarded by exim4

I was studying and searching 2 days about how to configure my exim/spamassassin/clamd configuration. I have the next situation: I have an email a@domain.com redirected to a@gmail.com. Unfortunately, ...
0
votes
0answers
56 views

SpamAssassin keeps crashing during cleanup of child pid due to SIGCHLD: interrupted, signal 2 (0002)

I am running SpamAssassin on an Ubuntu Server with a quad-core processor and 7.5GB RAM. I am running a Mail Server on a separate Windows Machine and this Mail Server passes messages to the ...
-1
votes
2answers
186 views

Postfix is Sending Spam [duplicate]

I have an Ubuntu 12.04 server, hosted on AWS, that powers a dozen WordPress installations using Nginx and php5-fpm. The problem just began one day. My server was down. Panic! Whenever I turned it on ...
0
votes
0answers
87 views

Incoming mail flagged as spam

A customer of my company can no longer contact us via mail. Our mailserver keeps bouncing their email as spam. I've already contacted them but they say the problem lies with our server, not with ...
2
votes
1answer
51 views

Simulating spam request?

I'm trying to test out some blacklist directives that I've just implemented., Is there a way to simulate spam requests?
1
vote
1answer
48 views

How to solve gmail spam filter issue

We have a problem when sending emails to "gmail.com" domain. All of our emails end up in spam folder. We do not send spam or bulk emails, so I would like to know is there a way to solve this issue. ...
0
votes
0answers
29 views

Spammers sending out from an inactive domain

We have a shared hosting service running QMail and Plesk. One of our inactive clients was left active in the system by mistake, and spammers found their very weak passwords and sent out a massive ...
1
vote
0answers
56 views

How to professionally handle spam / abuse complaints as an ISP [closed]

Introduction story to have a base and not some sort of meta-question I am handling some spam cases where our email addresses got bought or collected somehow by some marketing agencies, from which we ...
1
vote
1answer
94 views

Mails marked as spam in gmail for some accounts

I have a couple of domains running on my VPS with VirtualMin. I have DKIM enabled, reverse DNS is setup and SPF records are added by Virtualmin. Now I have a main account (admin) which I can easily ...
6
votes
4answers
653 views

How can I block outside mail FROM postmaster@mydomain.com?

A security firm has been testing my mail server and claims my Postfix daemon is an open relay. The evidence is as follows (valid public IP for mail.mydomain.com has been changed to 10.1.1.1 for ...
0
votes
1answer
112 views

Postfix: don't bounce for remote rejects

I'm having a problem with sending bounces to spammers when a remote "trusted" smtp server rejects a mail. My server manages mail for company1.com that has a virtual alias support@company1.com that ...
1
vote
3answers
204 views

Are generic reverse DNS entries acceptable for an outgoing SMTP server?

Our PTR records are managed by our ISP, as our ranges are too small for them to consider delegating to us. So, every time I want to update an entry, I have to email their support team. In an effort ...
0
votes
0answers
159 views

DKIM SPF passes but mail goes to Spam Received: (from abc@localhost)

I am facing an issue with the DKIM setup. We are sending newsletters which are going to spam in gmail. The dkim & spf passes. Even the reverse dns is setup properly. Below is a copy of mail ...
-2
votes
1answer
90 views

Using Spam Assassin as email proxy

I'm looking to setup a Spam Filter Proxy for my clients, not too many mind you, and have it as transparent as possible. I read about SAVASM and Spam Vigilante, and while they are perfect I guess for ...
0
votes
1answer
287 views

dkim-milter appears not to be signing my emails correctly in VirtualMin

I have a VPS that I had a fresh install of CentOS 6 on it and then I installed virtualmin on it and we've been great for a few months. I've been hosting a handful of domains from there and on one of ...
0
votes
0answers
159 views

Server is being used to send spam email via sendmail

When I run sudo tail -f /var/log/mail.log I can see a number of 'live' entries appearing such as Jun 6 00:40:03 ks393391 sm-msp-queue[2641]: r55MV0l1001642: to=ledbpw@gmail.com, ctladdr=www-data ...
0
votes
1answer
111 views

Global Authority for Blacklisting IPs

I know that there are few common ways to block attacking IPs (such as deny in htaccess). Additional to that, we could get a huge list of IPs to block from misc sites such as : ...
-1
votes
1answer
93 views

Sendmail mqueue deferred (list.dsbl.org) [closed]

Hi I have a issue with a mailserver configured with sendmail. In mailq I have many entrys with: (dnsbl map: lookup (254.0.168.192.list.dsbl.org.): deferred) Thanks.
1
vote
1answer
1k views

Whitelist rule for reject_rbl_client in Postfix?

Is there a way to add an exclusion/whitelist rule (or similar), which would work against reject_rbl_client behavior? I have a postfix service running, with following client restrictions: ...
1
vote
1answer
79 views

Open Proxy Spam Traffic

I have an apache server that was misconfigured and left as an open proxy for a week. A bunch of requests for forwarding pay-per-click advertising started streaming in and using our server. This ...
0
votes
1answer
191 views

Mail is marked as spam although SPF and DKIM pass

I have configured Postfix to send mail from a dedicated server hosted let's on IP X.X.X.X and domain name example.com. DKIM, SPF always pass when I send mail locally from that host but still ends up ...
1
vote
0answers
42 views

Uncontrolled spam sent from server [duplicate]

Hi I have shared hosting on a UK2 server that got suspended again. They claim that my account is sending SPAM messages but the problem is that I can't trace those from the information they've given me ...
0
votes
3answers
1k views

smtpd_helo_restrictions = …, reject_unknown_helo_hostname occasionally rejects mail I care about, how to handle?

I have configured my postfix as follows: smtpd_helo_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unknown_helo_hostname This is working well because most spambots don't seem ...
-1
votes
2answers
104 views

All Details of a Running Process [duplicate]

Possible Duplicate: How do I deal with a compromised server? This process is running on my Linux server and is sending spam (connecting to port 25 and port 80 with random IP's). top - ...
1
vote
1answer
232 views

Sending email from a Google Apps address

I have a website in a Linode VPS in Linode. The email address to receive emails is hosted in Google Apps, but I send emails from postfix. For that to work and not cause problems with spam folders, I ...
1
vote
2answers
160 views

How Reverse DNS does what it does

Hopefully this is not a stupid question, but I cannot find a clear cut answer. Can someone please inform me exactly what 'source address' is used in Reverse DNS? Does rDNS pull the IP address from ...
2
votes
2answers
218 views

Tons of spam on dreamhost mail user account

I use dreamhost for my webserver/ email host. I have about 25 users on one domain. and 1 of these users is absolutely inundated with spam every day. I have tried using dreamhosts poor blacklist ...
1
vote
3answers
1k views

How to block this URL pattern in Varnish VCL?

My website is getting badly hit by spambots and scrappers, I am using Cloudflare but the problem still remains there. The problem is spambots accessing non-existing urls causing a lot of load to my ...
34
votes
4answers
3k views

Is greylisting still an efficient method for preventing spam?

I've used greylisting on my servers for many years, but I don't know how effective it is nowadays. Is it still good for fighting spam in 2012? Or is the typical spammer MTA capable of resending ...
-4
votes
1answer
86 views

Stop BPimage walker bot [closed]

How can i block all bots except a few including BPImage walker...it is creating a huge amount of load on web site and consuming lots of bandwidth
66
votes
9answers
20k views

How to stop people from using my domain to send spam? [duplicate]

I receive Mailer Daemon messages saying certain emails fail. My domain is itaccess.org which is administered by Google apps. Is there any way I can identify who is sending emails from my domain, and ...
1
vote
1answer
102 views

Tracing of spam sender

I have a mail server using CenOs 5 as Os and postfix as an MTA. My mail server is used for sending mails of clients subscribed to send mail from my server.The problem is that some of my clients are ...
0
votes
2answers
573 views

SpamAssassin sending legit emails to spam, despite sender being whitelist

I can not for the life of me figure out why emails from a "white-listed" sender are still getting very high scores from SpamAssassin and not being delivered. The email headers are: From ...
-1
votes
1answer
91 views

every email marked as SPAM or not even delivered? [closed]

I am having a very serious problem! I registered the domain http://codepigeon.com a while back (2 months) and have dev. an app to easily make changes to ones source code across multiple webpages or ...
-3
votes
1answer
355 views

Email header analysis

I have an email header which is showing the following information, which i believe is faked. The mail purports to be from a gmail account but I'm not sure if this is the case. Ordinarily you read the ...
5
votes
2answers
380 views

97% of emails reaching IronPort/Domino are Spam

We have a Domino mail server protected by Iron Port (v7.1.5 I think). Iron Port reports an average 96%-97% of emails are stopped by reputation filtering, and around 3% of emails are clean messages. ...
1
vote
1answer
136 views

Recovering a server from being an open relay

One of our Mac Pro machines running Apache was inadvertently acting as a forward proxy with a public IP, after some organisation proxy rules changed. Consequently it was discovered by spammers and ...
1
vote
2answers
710 views

Postfix: how to verify sender's MX record

is it possible to configure Postfix to verify the sender's MX record? For example: if a mail comes in from some.sender@example.com it should look up the MX record(s) for example.com and verify that ...
2
votes
1answer
632 views

Mail classified as spam, but passes SPF and DKIM

I have configured Postfix to be responsible for subdomain.example.com (google apps is responsible for example.com so I didn't want to mix the two). As I mentioned in question title, SPF and DKIM ...
4
votes
1answer
57 views

Postfix/Spam Prevention

How do I make Postfix reject all mails when the client is not authenticated and the sender is from my domain? Is there an easy way to do this?
1
vote
2answers
133 views

SBS Email Outbreak

I have a client that is running SBS 2003 Std. and they have some sort of mass mailer that is spamming mail. We are running the most current defs. of Vipre anti-virus, we are not a setup as a relay, ...
0
votes
2answers
627 views

Spammer using my server. How to stop him?

looks like a spammer got into my server. I am new to LAMP and don't know how to find where my vulnerability is, not sure if SMTP, scripts, or where. My server was working fine for over a year but now ...