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

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4answers
47 views

How to find spam email sending script on server

For last 3 months i am getting email from my hosting providers that my server is sending spam emails and today i did research on it and found that it is actually doing. I used exim to check out the ...
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0answers
22 views

Exchange 2013 Incoming email not received with Anonymous Users Disabled

I have a Exchange 2013 server deployed in my Active Directory network that fails to allow incoming email from outside the domain when 'Anonymous Users' is turned on from the Receive Connector in EAC ...
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0answers
23 views

Exchange 2013 Receive Connector Scoping and Open Relay

I have an Exchange 2013 server which was a victim of spam infiltration, and the exchange server was being used as an open relay for unauthorized users (and domains) to remotely send spam. I have done ...
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votes
1answer
42 views

How to detect which PHP script is sending SPAM [duplicate]

A php script is sending tons of emails. I want to detect what is the source. All emails are sent by the use www-data which the user used by apache. When I check process, I have this result : www-data ...
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0answers
13 views

Prevent email from [duplicate]

I have my own email sub-domain which I use to send my clients email invoices and announcements. I rarely use the email to conduct any marketing to the outside world, so it's the same 2-3k clients that ...
1
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0answers
15 views

How To Stop Apache Logging Client Denied By Server Errors [duplicate]

I get an annoying amount of spam traffic from the Ukrane, Russia, Korea etc. I have setup rules in my .htaccess file to block all of these countries and it's working great. The problem i have now is ...
1
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0answers
23 views

Do spam filters work if I use a forwarding address?

I made the mistake of replying to a linkedin connection request with my main forwarding email and have started getting spam after years of no spam (have blocked linkedin requests now). I have been ...
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votes
1answer
59 views

Block outgoing emails from Postfix from non-existent users

I'm getting spam sent through my server. The sender names are always random, but always in the form randomname@mydomain.com. I've tried adding reject_unlisted_senders to the ...
1
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1answer
132 views

All External Mail to Office 365 Fails SPF, Marked as Junk by EOP in a Hybrid Deployment

In short: legitimate emails are landing in Junk folders as EOP (Exchange Online Protection) stamps email messages as junk (SCL5) and SPF-failed. This happens with all external domains (e.g. ...
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0answers
18 views

new .tech gTLD : risk of email blocking? [duplicate]

I am considering the purchase of a .tech domain for a legit business. However, I am concerned about the risk that anti spam programs will block my mails, just like it is (was?) done with .biz, ...
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0answers
17 views

Two folders on /var/www change last modified date frequently - possible rootkit? [duplicate]

I have a hacked VPS and I can't find any compromised script. They are sending emails using the internal SMTP server. However I noticed that when the email spamming starts (because it takes few hours ...
1
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1answer
18 views

Does order of UFW rules matter?

When I first initialized my ufw, I did ufw default allow outgoing ufw default deny incoming ufw allow 80/tcp ufw allow 22/tcp Over the last week or so, I've been going through my access logs and ...
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0answers
19 views

Exim emails being recognized as SPAM [duplicate]

I have been running a VPS for the past two months which is currently hosting corporate email and a work-in-progress website. Emails are being sent from this server via exim but major email service ...
0
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0answers
58 views

SpamAssassin not filtering well on Mac OS X Server

I am trying to deal with an increasing number of spam messages on a server I administer. We are using Mac OS X Server and have added the following RBL Servers to the blacklisting feature in ...
-3
votes
1answer
52 views

Postfix - Allow emails to virtual domains but block spam?

My Postfix is set up with virtual domains. This allows people to send an email to *@mydomain.com and it'll be forwarded to my gmail account. Basically the end goal is to simply allow people to email ...
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0answers
29 views

Postfix, procmailrc, SpamAssassin letting some but not all spam messages through

I have postfix running on my server with a main.cf as follwos:- myorigin = $mydomain inet_interfaces = 213.229.80.33, 127.0.0.1 mydestination = 213.229.80.33, corunna.com, localhost, ...
2
votes
2answers
64 views

Postfix seems to send spam

I recently discovered this in my postfix-log: Aug 4 11:09:12 mail postfix/smtpd[71597]: connect from unknown[59.88.35.206] Aug 4 11:09:14 mail postfix/smtpd[71597]: Anonymous TLS connection ...
0
votes
1answer
39 views

Exchange 2010 - how to hide first hop IP from mail headers

My company has an Exchange server which forward outgoing emails to a mailhub, which has a spam filter. (user)----(company's Exchange)----(mailhub with antispam)----(the world) It happens that my ...
1
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1answer
32 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() ...
1
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1answer
38 views

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

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
47 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
65 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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votes
1answer
36 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
19 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 ...
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0answers
10 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
32 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
34 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 ...
1
vote
1answer
18 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
vote
1answer
60 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
34 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 ...
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0answers
61 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
43 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
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1answer
42 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
189 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
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0answers
29 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
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0answers
109 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 ...
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0answers
43 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
167 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
131 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
201 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
70 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
votes
0answers
65 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
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0answers
75 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
16 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
50 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
71 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
184 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
40 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 ...