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

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19 views

just postfix config error or did I get hacked? [duplicate]

A few hours ago I noticed that my server is sending more mails than usual, I thought it was through a compromised account, so I changed the password of the account in question but the spam didn't ...
0
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0answers
8 views

On a VPS with WHM, configure DenyHosts List as SPAM Blacklist [on hold]

DenyHosts automatically creates a blacklist of IP's. Is it possible to use that blacklist as a SPAM blacklist as well?
0
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1answer
29 views

How do I block all BlazingFast.io IP ranges?

In my logs I've been noticing several cases where frequent requests from an IP spam POST requests to a specific Wordpress script. What all of these spam source IPs have in common, is that they ...
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1answer
52 views

Some emails are being rejected by the recipents [on hold]

Mail to following recipient failed due to following mesage. I am not sure what is causing this error, some say it could be the email signature which is causing problem or spam policy of the ...
0
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2answers
33 views

Postfix spam abuse [duplicate]

I have a terrible problem, my joomla website is being abused to massively send spam. I have no clue on what is actually happening, but my postfix mail queue is constantly filled with thousands of spam ...
0
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0answers
19 views

exim queue notification if a domain is sending more than x number of emails

I am running Exim as an MTA. I have also implemented a Per hour Per domain email Limit. Still I see that my IP reputation goes bad if a spammer sends more than x amount of emails in 24 hours or so. I ...
1
vote
0answers
23 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
12 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
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1answer
33 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
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1answer
35 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 ...
-2
votes
0answers
16 views

configure sendmail to discard inbound mail sent in error

Management has asked that I set up a sendmail rule to not respond to internet mail sent in error. I think this can be done through ruleset hooks, where an address resolving to $#error can be routed ...
4
votes
1answer
169 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 ...
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0answers
24 views

Does having the IP for a naked domain on a blacklist affect spam filtering if that IP isn't used for email?

Let's say I have a domain used to host a website, example.com. Email is handled exclusively via Office 365 with all the recommended settings. When I use MX Toolbox's blacklist search and search for ...
0
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1answer
63 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
9 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 ...
0
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2answers
96 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
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0answers
26 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
36 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 ...
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votes
1answer
44 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
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0answers
13 views

EXIM alloying in spme despite strict rules [duplicate]

Here is a copy of a header from a recent spam e-mail: Return-path: <Deals---Alert@headja.cricket> Envelope-to: user@domain.tld Delivery-date: Tue, 07 Apr 2015 22:58:51 +0400 Received: from ...
0
votes
1answer
27 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
0answers
23 views

Lotus Domino how to Enable Verify connecting hostname in DNS but with exception

Hi I enabled @ LOtus Domino the Configuration -> Message Settings -> SMTP Inbound Controls Verify connecting hostname in DNS This blocks all messages incoming if the sender IP has no reverse dns. ...
0
votes
1answer
49 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
29 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
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2answers
114 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
27 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
46 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 ...
9
votes
3answers
161 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
59 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 ? ...
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2answers
73 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
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0answers
10 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
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0answers
25 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
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0answers
31 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
35 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 ...
0
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0answers
19 views

Prevent Hmail from relaying spam

I am running hmail and it is sending a lot of spam without my knowledge and without me making it send anything. This is highly frustrating. What must I configure in Hmail to prevent it from ...
1
vote
0answers
44 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
173 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. ...
7
votes
3answers
105 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 ...
1
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0answers
68 views

Emails keep going to Gmail spam folder - DKIM, SPF, are set up - Very perplexing [duplicate]

Note: This is NOT a duplicate question, there are no questions that address the very specific details of headers as far as whether the inclusion of multiple DKIM entries will result in landing in the ...
2
votes
1answer
56 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
490 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
97 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
54 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
70 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
46 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
47 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 ...
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0answers
13 views

How to remove an entire Qmail queue? [duplicate]

I have a Qmail MTA queue with 100k messages in the queue. How can I remove the entire queue? I need to regain control of my machine, I will investigate the compromised php scripts afterwards. The ...
1
vote
1answer
48 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 ...
1
vote
2answers
256 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
118 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). ...