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

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0
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9 views

What's a reproductable way to set up a Linux server for sending e-mails but no spam? [duplicate]

I've created a software that has to be installed onto a Linux server and from time to time it has to send a notification email. So, for people who want to use my software, I've created a bash script ...
0
votes
1answer
29 views

Exchange server 2016 Content Filtering

I have setup an exchange server on premise with at SMTP Relay on our VPS. It works very well, unfortunately I’m a little confused as to where I setup the various permissions for SPAM. All my incoming ...
30
votes
5answers
404 views

Is it becoming impossible to be a small mail provider?

I operate a small mail server for my private emails, some friends who have websites and two NGOs. In total my server sends between 60 and 400 messages a day. Now a lot of these emails are personal ...
1
vote
1answer
48 views

Spam filtering: MX record and reverse DNS (PTR)

If I perform an MX query on my domain (domain.com) I receive this answer: Pref Hostname IP Address 5 mail.domain.com 12.34.20.145 If I perform a reverse DNS (PTR) query on ...
1
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0answers
20 views

PHP Script sending spams and mail.add_x_header not working

I've got my server hacked lately by some Php64 malware. Since then, I have found a lot of PHP files in my /var/www sub-folders. I am trying to delete each of these or clearing the files when some ...
-1
votes
1answer
22 views

Why are some spam emails addressed to hexadecimal addresses?

I've run Postfix to host my domain's email for years now, and generally I've reduced spam to an acceptable level (including use of greylisting, SpamAssassin, and DNSBL). One thing I've never figured ...
-1
votes
0answers
20 views

Keep getting emails from root with site IP - Ip addresses banned

I keep getting emails from my Server root that IP addresses have been banned. The issue is that the IP addresses that are listed in the email are the same Ips for my server Ips. Banned the ...
-1
votes
0answers
9 views

send-only postfix - gmail spam [duplicate]

I have a minimal postfix running on pi. I need some notifications for smarthome. Sending emails work how it should but gmail puts them in spam folder. Im new in email servers and i dont know what is ...
0
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0answers
7 views

Using mail.domain1.com for domain2.com mail server? [duplicate]

I have a Linux CentOS machine, and 2 domains hosted on it: domain1.com domain2.com Is it safe to use one mail server for both: mail.domain1.com? If I use mail.domain2.com, I have problem ...
0
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0answers
16 views

Google puts my mails to spam [duplicate]

I have a mail server with proper (I think) configuration, but Google puts my mails to the spam folder. I see the following error in the source: Received-SPF: fail (google.com: domain of ...
0
votes
2answers
43 views

Someone sending email through my Postfix/Dove

there might have been answers to this many times. But I can't seem to find one that fits my issues so here we go: I've ran an email server on my centos machine for over four months without problem, ...
0
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0answers
15 views

Postfix mail always in spam [duplicate]

I've installed and configured postfix trying to find the best way on the web. This is postfix main.cf: smtpd_tls_security_level = may smtpd_tls_received_header = yes smtpd_tls_session_cache_timeout ...
0
votes
0answers
23 views

Can I use Spamassassin to classify text-only content?

I wish to know if I can use spamassassin classify text-only content? Right now I'm using the following command: spamassassin hello.txt But I'm getting the following warnings: 1.2 ...
0
votes
1answer
97 views

Postfix sending spam to local email addresses without authenticating

Running on Centos 6.4. Past two weeks I've been receiving emails from other email accounts located on our server. admin@site.com is sending to careers@site.com and nonexistentemail@site.com is sending ...
1
vote
0answers
34 views

Postfix send SPAM

I come a few days being listed in the Spamhaus CBL. CBL list reports that I have a virus on the network and that is sending emails as "localhost.localdomain". I do not know where to be coming this ...
0
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0answers
44 views

SpamAssassin: avoid FREEMAIL_REPLYTO on Contact Form

Suppose: someone fills out my contact form on www.example.com/contact/. My server-side script sends this information to a sales person at the organization. To make SPF work, I set the "From" as ...
0
votes
1answer
31 views

How do I tweak spamassassin scores on Ubuntu Server?

I'm wondering what's the right way to tweak scores for Spamassassin's builtin rules. I know how to edit /var/lib/spamassassin/3.004000/updates_spamassassin_org/ but that doesn't feel right - my ...
-1
votes
1answer
42 views

Why does Google junk mails from my server? [duplicate]

I have a send-only mail server setup on an Ubuntu VPS. The mail server is only used to send out registration e-mails from a web application. I have the following configured: DomainKeys Identified ...
3
votes
2answers
77 views

Understanding exim4 outgoing message logs. Am I a spammer?

Today I got many spammy emails into my mailbox, I looked in exim4 logs and I found some suspected activities. I would like to understand the serverity of this attack, if I got spammy mail I can ...
1
vote
1answer
30 views

Postfix Hostname domainbased

I would like to excuse in advance, if my question has already been answered before but im going crazy since a week now... I'm not new to this but after a while in another job, my "skills" are totally ...
0
votes
1answer
46 views

SPF in hotmail are not used [duplicate]

I have a problem with Hotmail provider, all mail sent from my server goes to SPAM folder. I Have added a correct SPF to my domain example.com but into the headers is not used (spf=none) and the token ...
0
votes
1answer
38 views

Reject emails from specific address on exim

i have a spammer that is driving me crazy. What i want to do is reject his emails altogether so he receives an instant message saying "message rejected" or similar. Can exim do this? How? Note: This ...
2
votes
1answer
29 views

letting anonymous users use a form to send emails as if it is from their own mailboxes without getting flagged as spam

I am working on a project for an environmental NGO. They want to let users use a form on their website, provide their name, their email address and select certain emails from a list to send complaints ...
1
vote
2answers
119 views

Prevent MAILER-DAEMON NDRs from deferring in Barracuda

Mail Server: Zimbra 6.0.9 Spam-Firewall: Barracuda Spam Firewall 300 (Firmware v6.1.5.006) All spam firewalls only work so well, and unfortunately some spam will come through. Incoming spam will ...
0
votes
1answer
32 views

trying to locate process on server which is sending spam email [duplicate]

I have a CentOS server running Exim, with a standard LAMP stack installed. The problem is that there is a process that is sending out unsolicited emails, AND I do not know how to locate the process. ...
0
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0answers
14 views

Mail get's registered as spam, everything set up correctly [duplicate]

I'm having serious troubles with getting my email to be not detected as spam. I've tried EVERYTHING. I've tried multiple forums and even there they were out of ideas. So, I have tested almost every ...
0
votes
0answers
37 views

mail server should anyone be able to send internal mails from external IP without authentication?

Sorry for the long title. My parent organisation that owns the company I work for accepts emails to be sent from test@org.com to test@org.com when connecting via port 25 telnet externally. I'm ...
0
votes
1answer
63 views

How to get rid of spam mails with return-path and from non-existent@mydomain.tld

Over a few days I'm getting several spam mails to my junkmail folder. The return-path and from addresses are always non-existent mailaddresses of my own tld (for example non-existent@mydomain.tld). ...
0
votes
0answers
36 views

Postfix selectively bypassing the spam

I have Centos 7 installed and postfix as MTA on the server. Here is my anti spam postfix additional configuration: # main.cf ANTI SPAM disable_vrfy_command = yes smtpd_delay_reject = yes ...
0
votes
0answers
9 views

Five Questions about Specific Examples of Sender Policy Frameworks (SPF) [duplicate]

I have spent some time learning about SPF and have five questions based on specific SPF policies. I obtained the SPF data via http://www.kitterman.com/spf/validate.html In advance, many thanks for ...
0
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2answers
74 views

signed-by in mail header is not added as I have installed and configured my domain

I have checked in http://dkimcore.org/c/keycheck that my site has a valid TXT record for DKIM. My domain is myDomain.com and my selector is mail. I used -t and says to servers to ignore errors and ...
0
votes
1answer
92 views

Apache access log full of unauthorized and suspicious requests, how to take action

I have setup a small tiny VPS for my own website. Since it was live, I see many suspicious activity in the access.log file. When I was on a shared hosting I did not have access to this file and ...
0
votes
1answer
30 views

Exchange 2007 - Sending spam from MY domain but invalid, random users

I'm running Server 2003. Exchange 2007. I've got something on the system sending out tons of spam, and now mostly blocked from the outside world. (We can receive, but not send because we're on ...
0
votes
0answers
7 views

How do I whitelist a spam trigger in a SpamAssassin update channel?

Somehow one of our customer URLs seems to have gotten into some or all SpamAssassin rule sets that are distributed through update channels (we suppose). Mail provider that use Spamassassin mark all ...
2
votes
0answers
72 views

Spam ranking explodes if a certain URL is mentioned in email body - why?

If any email contains the URL lafargeholcim-foundation.org or if an email is sent using an email address from that domain, certain providers rate those mails as Spam, others not at all. It is enough ...
0
votes
0answers
11 views

Yahoo marked my mail as spam [duplicate]

Yahoo is marking our mail as spam. Mail header says that Domain Key, PTR, SPF all ok. From Abrabos Mon Jan 18 23:41:38 2016 X-Apparently-To: carry.vaillant@yahoo.com; Mon, 18 Jan 2016 23:45:10 +0000 ...
1
vote
1answer
19 views

how do I filter and reject mails in postfix based on the 'to' address

My CentOS server is configured for outgoing mail only. I need a filter to reject mails targeted at selected destinations. For example, if I test with > mail -s "test" spam@trash.com I want this ...
1
vote
0answers
13 views

Email rejected as Spam by Gmail [duplicate]

My domain is apitrak.com registered at gandi.net. For my mail I use Apple Mail and th Gendi.net SMTP server throught SSL. When I respond to a Gmail address, I get an "Undelivered Mail" response by ...
-1
votes
2answers
145 views

How can I reject spam before reaching SMTP on Postfix

My server has started receiving thousands of attempts to use my mail server to send spam from dynamic.hinet.net. The attempts are always rejected, but it's non-stop. I'd like to block these attempts ...
0
votes
1answer
73 views

Postfix Localhost Server Sending Spam to Itself

I have an iRedMail server that runs Postfix and am trying to determine the source of its spam problem. I have since changed the MX records on the domain for the address receiving spam and the good ...
2
votes
1answer
40 views

SPF “include:” does MX stay as included domain's MX, or get translated to the includer's MX?

SPF records allow you to include another's domains SPF record within your own. For example, example.com can have include:_spf.google.com in its SPF record to include all of the SPF rules for ...
0
votes
0answers
38 views

How to block referral source on apache with special characters?

I've been getting referral spam on my site. I've tried several options to block it, but it still hits it. I think it has to do with being special characters on the referral? This is the referral ...
3
votes
0answers
99 views

Postfix reject_rbl_client Blacklists Not Working

I have a mail server (iRedMail) that uses Postfix. I've been getting a lot of spam, so I modified the /etc/postfix/main.cf file and have the smtpd_recipient_restrictions set to this: ...
-1
votes
1answer
35 views

Add a second IP to SPF record, from an external SMTP server [closed]

I would like to add the IP of an external SMTP server to an existing SPF record, which is looks like this: "v=spf1 a mx ip4:185.6.139.6 a:frey.mailpool.1.netmask.hu a:frey.mailpool.2.netmask.hu ...
0
votes
0answers
66 views

SpamAssasin FSL_HELO_BARE_IP_2 and RDNS_DYNAMIC error

Why I got FSL_HELO_BARE_IP_2 and RDNS_DYNAMIC error from SpamAssasin? This message was send from an authenticated client (host02-4-dynamic.17-80-r.retail.telecomitalia.it) to a Exim4 server ...
0
votes
2answers
76 views

Postfix sent mails are bounced or go to spam

I recently tried setting up a mail server to be able to send mail for the websites I host with apache. At first I tried to work with exim but I was overflown with error messages and mails I tried to ...
0
votes
0answers
22 views

Emails ending up in gmail spam folder [duplicate]

Emails from my dedicated server are ending up in spam folder in gmail even though the server is not blacklisted and with good reputation - see below. the server level issues that would cause this ...
7
votes
3answers
155 views

Is SRS rewriting absolutely necessary for a forwarding mailserver?

I am operating a Postfix email server for my domain, say mydomain.com. It mostly acts as a forwarding email server: users receive an email address @mydomain.com, but usually elect to have their ...
1
vote
1answer
31 views

Postfix: reject mail, but still deliver or archive in a folder for spam analysis

I'm using Postfix and Spamassassin, and Postfix is rejecting incoming mail that fall into spam rules. Mail are then forwarded to different relays based on many factors. Is there a way to archive ...
2
votes
0answers
27 views

Does sending mail on behalf of another domain (using a Sender: header) increase chances of being marked as spam?

Our marketing department is contracting with a service that will send email to prospective customers on our behalf. From what I'm gathering from their documentation, it sounds like they do so via the ...