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

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20 views

nginx spam 404 errors

My server is spammed by multiples XXX domains, there is a lot of 404 errors in my logs and i can't find the solution to stop that. 2015/07/31 09:13:20 [error] 7070#0: *610 open() ...
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1answer
21 views

How Does DNSWL work? How can I gain better trust? [on hold]

How does DNSWL work? It's clear to me when someone report a spam, but how can I gain a higher score/trust? Do some companies report "good" servers? Or will the score go up with time without reporting ...
2
votes
1answer
38 views

ipset not being applied to iptables

I'm trying to filter out a country that keeps probing my SMTP server (CentOS6) and I can't seem to get the ipset to work out right in iptables. I downloaded that countries IP addresses from ...
2
votes
2answers
51 views

Spam mail forwarded through my server using valid user

I am getting "Undelivered Mail Returned to Sender" messages. The relevant mail messages are being forwarded using a valid user (mike@proactech.com) on my server (server1.nbicharts.com). I control ...
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1answer
26 views

Spam sent from my domain after a Wordpress exploit [duplicate]

I have 2 domains on my dedicated server running debian. One of them is linked to a wordpress site, mydomain.com. I've noticed that on both my sites, lately, the performances were horrible so I ...
0
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0answers
14 views

Prevent Exchange Approval Assistant from sending rejection notice

I'm using Exchange Approval Assistant to screen emails with potentially dangerous attachments. Since those emails that get rejected are almost always spam I'd like to be able to reject them without ...
1
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0answers
8 views

Is DMARC helpful to me if I don't need reporting?

I have SPF and DKIM setup and working for the email domain I administer. The next recommended step is to setup DMARC since SPF and DKIM are both in place. What are the benefits of using DMARC if both ...
4
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0answers
28 views

How Does Low Volume Affect (esp. live.com) Email Deliverability?

I've been sending emails for years with out any serious reputational shocks, but with low IP volumes (no bulk mail or automated transactional email), even with multiple Domain names. My Gmail ...
1
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1answer
23 views

exim: How to reject spam mail depending on destination domain

Currently, I have exim set up to mark spam mail, and reject spam mail with high scores, using these ACL instructions in the acl_smtp_data ACL: warn condition = ${if ...
0
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0answers
10 views

Will spamassassin’s bayes filter work if learned spam mails have *SPAM* in the subject?

When my mail setup detects that a mail is spam, it puts *SPAM* in the subject. Now I want to improve my bayes filter by training it on my corpus of spam. If I feed these thousands of mails to ...
-1
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0answers
14 views

gmail is filtering mail from my server to spam [duplicate]

I am really stuck here and connot find away around this gmail spam filter. Just some things that i have done: checked blacklists (not on any) Adding SPF Recoards (working) Adding DomainKeys & ...
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0answers
26 views

How to properly prevent listing in Spamhouse / CBL with the postfix MTA?

There is a server on a public IP address that acts as a webserver, thus websites can send and receive e-mail thru it, and clients/users can also connect directly with IMAPS, POP3S, and SMTPS and use ...
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0answers
16 views

Compound SPF record syntax [duplicate]

We send transactional email from our own server and use Google Apps for email. We have the transactional server SPF set up: v=spf1 ip4:37.xxx.xx.xxx ip6:2xxx:4xd0:a:1f39::1 a mx ~all but need to ...
1
vote
1answer
31 views

SpamAssassin with dovecot-antispam training

I'm trying to get dovecot-antispam working with SpamAssassin' sa-learn. This is my Dovecot configuration: antispam_backend = pipe antispam_trash = trash;Trash;Deleted Items; Deleted Messages ...
2
votes
1answer
33 views

Can IP reputation be affected due to automatic forwarding?

I am hitting a dead wall with the support team of my email hosting provider. The IP they assigned me was blacklisted and so sending emails to AOL.co.uk end up getting rejected. After several emails ...
1
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0answers
45 views

New Exchanger Server installation - Email marked as spam on hotmail/outlook

New to the email hosting scene - running an Exchange 2013 box. Email is always (literally, always) marked as spam when sending out to my outlook.com account. Whereas if its sent to an email address ...
0
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1answer
33 views

Forward all SMTP traffic to anti-spam server except for authenticated SMTP?

Historically, we have handled SMTP traffic across a handful of multipurpose servers each with their own local spam-fighting stack. We've grown and this is no longer feasible to maintain. Now we have a ...
0
votes
1answer
21 views

How to resolve “Domain shares an MX record (mx2.zoho.com) for a mail exchange which will not accept mail to the administrator”

I have found one of our domains on a spam list, http://rfc-clueless.org/. It states that: RFC2 is not a spam list. Each of our curated lists track compliance with specific requirements of RFCs ...
3
votes
2answers
113 views

Is setting up my own SMTP server to send email a waste of time with regards to deliverability?

I have a dedicated host serving a few domains I manage. I host my own email and IMAP server. The server is at buildoneforme.com with IP address 144.76.81.247. I think reverse DNS is working: $ host ...
0
votes
0answers
20 views

Filter internal mails for Spam on Office 365 (Exchange Online)

Whilst making the transition from the On-Premises Exchange 2010 Server to Office 365 (Exchange Online), we temporarily left unconfigured our E-mail filtering smart host (Websense Cloud E-mail ...
0
votes
0answers
78 views

Mail spam error while sending mails using Gmail id via Postfix hosted on Amazon EC2 server

This issue is related to using my own SMTP server to send email by any user mail id like some other mail APIs do e.g; Amazon SES, MailChimp. I am using Postfix as a mail server for my applications. I ...
0
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0answers
32 views

E-mail sent from mobile version of Zimbra is marked as Spam

yesterday I sent an e-mail from my company e-mail account to another company account, using Zimbra webclient on my smartphone. Unfortunately it was marked as SPAM, so I got task to find out why. Here ...
4
votes
1answer
117 views

Postfix reject_unknown_reverse_client_hostname: replace default unknown_client_reject_code (450) to 550. Why/When I should not?

In the daily battle against SPAM, there have been several times when I've been tempted to heavily enforce DNS requirements from clients connecting from the wild Internet. In detail, I would have ...
2
votes
1answer
32 views

Sane Spam Strategy [closed]

Right now I'm using spamd to score spam and then procmail to put it in user's .Spam Maildir folder and then manually running sa-learn on .LearnAsSpam and .LearnAsHam and then also manually just ...
1
vote
1answer
79 views

Why does adding /etc/mailname prevent amavis from adding X-spam flags?

Whenever I restarted my amavis process I encountered the message: Starting amavisd: head: cannot open `/etc/mailname' for reading: No such file or directory amavisd-new. I decided to add an ...
0
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0answers
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
votes
1answer
149 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 ...
0
votes
2answers
62 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
46 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
51 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
15 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
42 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
59 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
181 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 ...
0
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0answers
33 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
votes
1answer
140 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
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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
votes
2answers
139 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
54 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
85 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
72 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
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
36 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
38 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
50 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
37 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
234 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
61 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
212 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: ...