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

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1
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0answers
210 views

SFP + Gmail = Emails delivered to spam box

A long time ago I posted a question here: Postfix: Gmail marking my email as spam where I said that although emails send from my servers were passing all the DKIM and SPF tests they were getting ...
0
votes
1answer
19 views

Do spam impersonators impact my server's reputation?

Recently I opened my server's webmaster email inbox and found 32 "Delivery status notification failed" emails reporting the failure of the delivery of 32 emails I did not send. After some ...
0
votes
1answer
118 views

Unable to resolve IP Blacklisting with Spamhaus

I have a website which is currently assigned an IP 64.XXX etc from my hosting provider. This IP when looked up comes up clean with all Blacklist checks that I run. However, I am also being assigned an ...
2
votes
1answer
332 views

Exchange 2013 IPBlockListProvider blocking some (but not all) matched IPs

I have configured our Exchange 2013 Edge Transport server to utilize several IPBlockListProviders including Spamhaus. While they work great most of the time, there are still some emails which despite ...
4
votes
1answer
235 views

Can a backup mx server be configured to reject email submissions if it can connect to the primary mx?

I know that one technique spammers may use is to send spam to a secondary mail server, since those servers tend to be less powerful and may not have all the spam filtering that the primary has. Can I ...
1
vote
1answer
350 views

Why is my new domain email triggering spam filters?

I recently purchased and set up a new domain to send emails with Google Apps but noticed many of my emails are going to spam. I ran it through the isnotspam.com spam report and got this report. This ...
0
votes
0answers
11 views

Vultr modsec check (Spam Attempt) [duplicate]

i received vultr's warning spam email, that said: 1 attacks from x.x.x.x has been detected against malekal.com and when i contacted support, he told me use tcpdump (but i'm new here, i dont know ...
1
vote
2answers
596 views

Spam delivered by mx.google.com despite SPF fail

Some spammer use our e-mail address as sender in forged e-mails. Now we got thousands of bounced messages from no longes existing e-mails. We set up SPF and DKIM records but it does not stop. ...
0
votes
0answers
135 views

b.barracudacentral.org how configure my firewall

I use a ZyXEL USG200 firewall and I have to put in it the b.barracudacentral.org URL to activate the check of incoming mail. I use an external ISP DNS server and an external hosted email service, both ...
0
votes
1answer
524 views

How to identify source / script of spam IIS 7 [closed]

I am looking for a way to find the source of spam on one of my webservers, attached to Parallels Plesk Automation 11.5. The server currently runs Windows 2008 r2 & IIS7. The mail queue keeps ...
-1
votes
1answer
198 views

Mail being marked as spam by gmail but only from certain addresses [closed]

I am sending the same message through the PHP mail() function using two different addresses in the header. When I send the email with contact@domain.com it is marked as spam by gmail but when I send ...
0
votes
1answer
93 views

Block an http referrer on the server level

I am seeing multiple fake http referrers to several sites on my server, which for the most part doesn't bother me, except that they distort visitor stats. I have filtered the questionable domains out ...
0
votes
1answer
53 views

What could these email mean? [closed]

I receive these mysterious emails with no subject, no body, forged yahoo addresses, and forged Message-Id. I receive hundreds of these every day. I've included a sample of about a dozen below (I've ...
1
vote
1answer
77 views

relearn bayes autolearned spam when mails already processed by exchange

I'm using postfix with amavis and spamassassin to filter out spam before relaying everything to an exchange server. Regularly I got mails which weren't catched by spamassassin, even worse, they were ...
0
votes
2answers
842 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 ...
-2
votes
1answer
37 views

Keep receiving abuse messages from my service provider, but cannot find anything in maillog

I keep receiving from my provider abuse messages, that spam is being sent out from my server, but I cannot find anything in the /var/log/maillog files. No information is being logged there about ...
-7
votes
2answers
174 views

How to add an email to an international Spam Blacklist [closed]

I am sick and tired of getting invitation emails from LinkedIn. When I ask the senders to stop sending these to me, the answer is always the same: they never sent the email in the first place. This ...
11
votes
3answers
610 views

Email from our server tagged as junk by Hotmail Smartscreen unable to inform Hotmail that it is legitimate

Since more than 1 month ago we are having our email from one of our servers systematically tagged as junk by Hotmail Smartscreen filter. We have taken the following actions/measures without success: ...
-1
votes
1answer
198 views

My server mail going junk in hotmail and yahoo [duplicate]

All my server mails going to spam in hotmail and yahoo. Here is my full mail source. Can any one please help me to sort out this issue ? x-store-info:4r51+eLowCe79NzwdU2kRyU+pBy2R9QCDI9u8Kc1Jen/...
1
vote
2answers
120 views

How to send a large number of emails to a dated list of receipients

One of my clients was to send an email to ~100,000 recipients. The client is a state organization, the emails are not promotional, the recipients are all members of the organization and they are sure ...
1
vote
0answers
28 views

Can mailman/exim reject nonmember postings at connection time?

I am using Mailman with Exim. When a nonmember posts to a mailing list, Mailman can be configured in any of the following ways, each of which has a problem: Accept it -- this distributes spam to ...
-3
votes
0answers
97 views

How to disable Symbolic link creation option to users in cPanel server? [closed]

In shared hosting server, one user is trying to upload 100s of symbolic link files and trying to access files out side. Mostly it is for malicious purpose. In this image, you can see 100s of symlink ...
0
votes
0answers
66 views

How do I stop spam sent to mailing list posters by a list subscriber?

I administer a few moderate traffic mailing lists. I'm starting to get reports from list members about spam being sent to them after they post to a list. I've been sent a couple of these spam messages ...
2
votes
2answers
43 views

What's the purpose of spammy HTTP referers?

In the logs of my website, there's a lot of visits with a HTTP referer set to spam-like websites (usually Russian sites, I've noticed). I assume what they're doing is just using a web crawler to visit ...
1
vote
2answers
234 views

Automatically rescan email with SpamAssassin after it has been received

For the past months, the amount of spam I've been receiving has been driving me crazy. Despite running SpamAssassin (with RBL checks) on my Exim4 mailserver, a lot of it has been finding its way to ...
1
vote
1answer
435 views

Spammer on CentOS keeps blacklisting my server [closed]

I am the owner of a server and I have got a spam problem on one of the accounts. The spammer keeps sending lots of mails from fake non-existing addresses from (only) one of my domains. name@...
7
votes
3answers
224 views

Does “~all” in the middle of an SPF record signal the end of the record when it is parsed?

Our company's SPF record format is as follows: "v=spf1 include:_spf.google.com ~all a mx ip4:X.X.0.0/23 include:spf.example.com ?all" So we have an "~all" in the middle of our SPF record. On the ...
2
votes
1answer
318 views

Hotmail/Outlook dumping apparently valid emails

I've written some software that operates a non-commerical contact list for clubs, where the server sends out admin mails to the entire club. The emails are received Ok on Yahoo, gmail, and AOL, but ...
3
votes
2answers
2k views

Blocking PHP mailer spam using iptables

I host a public-facing web server running Debian Wheezy, and latest versions of Postfix, Apache, PHP, Spamassassin, ClamAV, rootkit hunter. Apache is configured with a handful of vhosts, each tied to ...
-3
votes
1answer
1k views

how to prevent fake mails from being sent on my mail server? [closed]

I use Zimbra as my office email server. Recently, an intern at my company showed that he could use my email id (without hacking into my account) to send emails to anyone in the company using the ...
2
votes
1answer
607 views

Postfix Limit mail for domain from IP range

I have multiple domains and email accounts on my postfix server. All of them get slammed with spam despite all my attempts to get it under control, I broke down and started paying for a pass external ...
2
votes
0answers
517 views

Exchange 2013: content filtering bypass

I have just completed a migration from a single Exchange 2007 to 2xExchange 2013 servers in separate sites. Mailflow is working correctly, but the anti-spam content filtering is not working as ...
-1
votes
1answer
146 views

Automated email sent using Bash mail function gets filtered as spam by Gmail [duplicate]

I have a Bash script which is scheduled to run everyday and sends out user notification emails using a command like: mail -s "Hello World" someone@gmail.com Why is this email detected as spam by ...
0
votes
1answer
286 views

Exchange 2007 ignores whitelist (BypassedSenderDomains) when IP is found on a block list

On my Exchange 2007 machine I configured the IP block list provider to query zen.spamhaus.org bl.spamcop.net dnsbl.sorbs.net some of our business contacts or on those lists and get blocked by ...
1
vote
1answer
375 views

Benefits of separate firewall product over AWS Security Groups for spam requests

I have a question that is an extension of this one: Examples where an AWS Security Group is not sufficient as a firewall?. Initially, the answer in that question made sense to me and I was working ...
2
votes
2answers
2k views

DNS and SPF configuration for Microsoft Exchange

We've started receiving spam with spoofed addresses from our own domain. So I'm trying to get my PTR and SPF records etc correct to prevent it. We're running Exchange 2010 on site with one server ...
0
votes
2answers
419 views

How to block IP addresses from port 25 [closed]

PROBLEM: Users are getting 15-20 SPAM emails per hour, even with SpamAssassin set to its most aggressive settings SOLUTION: SPAM filtering services are available from companies like McAfee (Intel). ...
0
votes
1answer
69 views

Blocking spam with SpamAssassin [duplicate]

I have a server that runs websites and exim for e-mail. I've added countless RBLs including barracuda to try and cut back on incoming spam. However, they still keep coming in. The clients use ...
0
votes
1answer
677 views

postfix header_checks - regex spanning multiple lines

I would like to create a spam filter that spans multiple lines in headers. This is my /etc/postfix/header_checks file: /^From:.*name[0-9]+@.+[\r\n]+To:.*name@domain\.com/ REJECT It's a valid regex,...
0
votes
1answer
46 views

Scraping log to identify emails sent to another MTA

I have a Courier MTA that seems to be sending spam. I want to scrape courier's mail.log to identify, for each mail that was sent to another MTA: The from address Where Courier got the email from ...
-2
votes
2answers
392 views

Emails from my domain getting blocked at all other domains [duplicate]

Recently I tried to set up a new email server using iRedMail on Lubuntu. The mail server workes very well when email conversation is in the same domain. But when a user tries to send email to some ...
2
votes
3answers
132 views

Block people searching for server admin pages

Occasionally I flip through our (apache) access log and I often come across people trying to fish for admin pages. For example, they are trying to access pages like: /wp-login.php /administrator/...
3
votes
1answer
424 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 ...
-4
votes
7answers
8k 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 ...
-2
votes
1answer
54 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 ...
-1
votes
2answers
449 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 ...
4
votes
2answers
16k 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 ...
2
votes
2answers
338 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 ...
1
vote
4answers
3k 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 outgoing ...
3
votes
1answer
420 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 ...