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

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2
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2answers
241 views

Spam daily report on servers using sendmail

we'd like to implement a daily spam report to our users like Dreamhost does. Basically we need to send a daily mail (at midnight for example) to inform a single user of all the emails currently in his ...
2
votes
1answer
1k views

Setting up a Barracuda Spam Filter

We have just purchased a Barracuda Spam Firewall 300, we have set it up but are having problems authenticating with our Exchange server (2007). I spoke to Barracuda about it and they said I need to ...
2
votes
3answers
9k views

Outlook - Junk Email - Add an email to the safe senders for entire company?

We've got an internal web based system that emails out reports on a regular basis. The emails are sent as: internalsystem@thecompanyIworkfor.com and the body of the email has a bunch of data and some ...
2
votes
1answer
34 views

Postfix and smtpd_client_rate_limit to detect compromissed accounts

Some of our clients are administrators who need to send corporative messages to no more than 300 clients, specifying all of these clients together in the "To:" fields, instead of individual messages ...
2
votes
1answer
387 views

How to setup a daily report of the top e-mail senders in Exchange 2010

We have had issues with compromised Exchange accounts sending a large amount of unsolicited e-mails out. We have mitigated this by using a cloud e-mail gateway that does a better job in detecting ...
2
votes
1answer
182 views

I'm getting 500s while LIMIT / block http POST request w/ Apache(

I'm trying to use core - Apache HTTP Server's <LIMIT> Directive to limit spamers from doing POST's to my website(s): <Limit POST> Order deny,allow Include ...
2
votes
1answer
258 views

User-trainable spam filtering with Exim and Dovecot

Currently I'm using Exim to deliver mails via dovecot-lda into Dovecot mailboxes. I'd like to add spam filtering, but I don't want to reject false-positives in Exim, and I want to train the bayesian ...
2
votes
1answer
517 views

Why Gmail mark as spam emails from my postfix server?

I'm trying to send email from postfix to different providers: Hotmail OK, Yahoo Not tested, Italian Provider OK, GMAIL KO ! I have SPF and rDNS set correctly ... this is the header: Delivered-To: ...
2
votes
1answer
228 views

Configure exim4 (or other MTA) to prevent sending duplicate emails

How can I configure exim4 (or another MTA) to avoid sending duplicate emails? For my purposes a duplicate email can be defined as: same recipient and subject (or same recipient, subject and body) I ...
2
votes
3answers
612 views

GeoIP based greylisting with Exim?

I have been using Sendmail together with milter-greylist for many years at several sites. milter-greylist has support for defining greylisting rules based on GeoIP database lookups. This is very ...
2
votes
2answers
128 views

finding a spamming computer on the network [duplicate]

Possible Duplicate: How do you detect a spambot on your network? Our network of 120 windows machines has 1 or more computers sending spam. Is there an easy way to find that machine, without ...
2
votes
2answers
1k views

How to limit the From header to match MAIL FROM in postfix?

SMTP clients are required to pass user authentication before sending emails to other domains (relay). And we can use smtpd_sender_restrictions to make sure the MAIL FROM address matches the ...
2
votes
1answer
1k views

Email sent using hMailserver goes to spam

I have configured hMailserver to send and receive email. It is working fine but all the mails send to any id goes to spam. reverse ptr for my domain is ponting to my static ip. mx-record is pointed ...
2
votes
2answers
185 views

Original sender is not correctly identified when spam is forwarded

I have a forwarding rule with Postfix that forwards all messages to my main email address. When a spam message is sent to one of my emails, it is forwarded but the sender is shown as being the ...
2
votes
1answer
806 views

Can I alter or analyse Exchange 2007 Content Filter Agent's scoring system?

I have a reasonably vanilla Exchange 2007 SP2 setup (Server Std. 2008) with a fairly liberal spam policy. I allow anything through with an SCL of 7 or lower and quarantine everything else. This lets ...
2
votes
1answer
2k views

Postfix is sending non delivery notification emails caused by spammers

I'm not very experienced with running a mailserver, I do not have it setup as an open relay (I've tested with various outside scanning scripts) However I had noticed my server still generating a lot ...
2
votes
2answers
2k views

How does Outlook 2007 decide if it should redirect an e-mail to the Junk E-mail folder? [duplicate]

Possible Duplicate: Is there any way to see why Outlook's client junk mail filter is marking a message as spam? My Question: How does Outlook 2007 decide if it should redirect an ...
2
votes
1answer
1k views

What is the email SPF entry for sending from Yahoo?

I have a client that is sending email from a Yahoo! Plus account as if from her own domain. Is there a way to set up the SPF record so that it covers all of Yahoo!'s outgoing servers? i.e., what do I ...
2
votes
1answer
100 views

I dont qualify for Junk Mail Reporting Program. Alternatives?

I am on shared hosting and therefore does not qualify for MSN Junk Mail Reporting Program. I am concerned about people who want to unsubscribe, instead clicking the "report as junk" button in ...
2
votes
2answers
1k views

What does the email header “X-CAA-SPAM” refer to?

I've got an application that sends out notification emails to users of the application (this is not spam; the information in these emails is solicited and useful, and is also a feature turned off by ...
2
votes
2answers
302 views

Forward spam is dangerous for my domain repute?

I have Postfix with spamassassin and forward the emails (including spam) to gmail.com, my problem is that when I send "legitimate" emails to gmail.com it is marked as spam, I've done everything that ...
2
votes
1answer
876 views

Yahoo marked my mail as spam and says domainkey fails

Yahoo is marking our mail as spam. We are using PHP Zend framework to send the mail. Mail header says that Domain Key is failed. Authentication-Results: mta160.mail.in.yahoo.com from=mydomain.com; ...
2
votes
2answers
1k views

How to deal with forum spammers on Invision Power Board (IPB)?

I am administering a public web forum based on Invision Power Board v2.3.6. Registrations are already filtered thanks to ReCaptcha, but I still have loads of people that seems to register manually to ...
2
votes
1answer
201 views

Does the Anti-SPAM filtering in SmarterMail work on the Distribution Lists?

I have a few distribution lists running in "Subscriber Only" mode, meaning that only somebody who is subscribed to the list (or on the Whitelist) can post to the list. Some spammers have discovered ...
2
votes
0answers
75 views

Restrict IMAP access for a given account to only one IP address in Exchange 2013

I've created a "spam crawler" account with full access to all mailboxes in an Exchange 2013 environment to get messages in the junk folder to feed the Bayesian filtering running on SpamAssassin in a ...
2
votes
0answers
84 views

Single MailCleaner installation for two distinct domains with user authentication

I would like to use one MailCleaner installation to handle two distinct domains as one centralised spam management system, sharing configuration and mainly the bayesian filtering database. Both ...
2
votes
0answers
198 views

How to identify the user/computer that is relaying spam through a mail server?

For the past couple of days, at certain intervals, a huge load of email is dumped on my Exchange 2003 server and relayed out until it gets blacklisted everywhere. Nothing like this happened for many ...
2
votes
2answers
112 views

removing spam between mail server and client

My postfix was badly configured and let a lot of spam emails through to an account. I've fixed postfix now so it's become a much better spam filter, and almost no new spam is getting through. However, ...
2
votes
1answer
49 views

Spam filtering in bridging

I'm using sendmail with spamassasin, one of my server is working behind it. All the port 25 traffic for the server behind it is being filtered. User are using SMTP authentication enabled in ...
2
votes
2answers
3k views

Reject obviously spoofed messages in Exchange 2007 SP2

I have an Exchange 2007 SP2 server which happily accepts SMTP messages whose sender is SomeRandomString@mydomain.com and the recipient is SomeRealUser@mydomain.com; this leads to all sort of spoofing ...
2
votes
2answers
85 views

Mail not delivered from custom email server (MS Exchange)

I have my own Exchange Server 2013 (SP1). I am able to receive emails ok but sending emails is not reliable. Emails sent to gmail or seznam.cz (email provider in Czech Republic) is ok. The problem is ...
2
votes
1answer
54 views

Training a spam filter based on Mailman moderator's actions?

I'm planning a Mailman server, and looking for a good way to enable list moderators train a spam filter (likely to be either spamassassin or dspam). Has anyone come up with a good way to run training ...
1
vote
3answers
409 views

Chinese bot visiting non-existent page every 5 minutes

Since 02.05.2013 some sort of bot is visiting my website, every 5 minutes. Most of the time it calls this URL, which doesn't exist: /viewtopic.php?f=3&t=849 Always with this user agent ...
1
vote
4answers
2k views

Prevent spamming

How to prevent spamming in Cpanel / Linux server ?
1
vote
4answers
704 views

Blocking non UK visitors to my website

I want to block all non UK visitors to my website, does anyone know how I would achieve this? I think I need to have a .htaccess file with all the IPs listed next to a deny command but how do I find ...
1
vote
2answers
776 views

Spam mail through SMTP and user spoofing [closed]

I have noticed that it's possible to telnet into a mailserver that I own and send spoofed messages to other clients. This only works for the domain that the mail server is regarding; I cannot do it ...
1
vote
4answers
116 views

sendmail sending mail to recipients I don’t know of; possible spam host

Recently I did an audit of my machine with logwatch and found out that my machine sends around 582 mails everyday. STATISTICS ---------- Messages To Recipients: 582 Addressed Recipients: ...
1
vote
2answers
256 views

How to properly set SPF record in my domain (Google Apps)

http://www.google.com/support/a/bin/answer.py?answer=178723 How to properly set up my mailservers DNS record? I mean is it good to only set a: v=spf1 include:_spf.google.com ~all or is it better ...
1
vote
2answers
129 views

How can I receive mails from otherwise blacklisted servers?

On the mail servers I set up in our company, I use several blacklists in postfix. These really help take care of the spam we get send our way. But every once in a while one of our (potential) ...
1
vote
7answers
1k views

Exchange Server: Ways to defeat spam?

What are all the different ways to combat all forms of spam on Microsoft Exchange Server (2007 preferred)? Types of spam may include: Embedded image spam malicious Zip file spam Email with SenderID ...
1
vote
4answers
419 views

How do SPF records reduce spam?

How do SPF records reduce spam? Note: I'm not asking how to setup an SPF record; I already know how to do this. Does the receiving mail server lookup the SPF record and determine if where the mail is ...
1
vote
2answers
335 views

Linux command line based spam checker?

Does a command line based spam checker exist? We have created a mailbox at a 3rd party, and unfortunately decided on spam checking 'disabled' in the initial setup. There is no way to re-enable spam ...
1
vote
2answers
449 views

SMTP Outbound-Only: More or less reputable?

I'm reconfiguring some mail architecture and wondering about this... For the purposes of avoiding blacklists and maintaining a good MX reputation, is it better to have: One public IP / SMTP server ...
1
vote
6answers
476 views

legit emails in junkbox

Hey this is actually a reverse question. My personal email (firstname.lasname@gmail.com) is winding up in many peoples junkbox and I have no idea why. What may the cause be? Is it because it has the ...
1
vote
2answers
103 views

Is my Postfix sending spam?

In my Rsys log I am getting weird email requests that are not initiated by my server: Nov 17 09:32:18 localhost postfix/qmgr[21748]: 8E52272C09: from=<>, size=33770, nrcpt=1 (queue active) Nov ...
1
vote
2answers
82 views

Listed on spamcop.bl.net - why?

I entered our mailserver IP and got this report: In the past 5.4 days, it has been listed 3 times for a total of 3.6 days How would I go about determining what caused my server to get flagged? Does ...
1
vote
1answer
61 views

Advertise NO-SOLICITING (RFC3865)

Does it bring anything to specify the Solicitation class keywords in Advertise NO-SOLICITING as per RFC-3865? For instance: dom.spammer:ADLT,dom.listing:ADV
1
vote
3answers
177 views

New domain, used by spammers

I just registered a new domain last week. I associated it with my Google Apps account. Apparently, some spam bot is using it with fake account names to send spam and I'm receiving a ton of bounces. ...
1
vote
2answers
368 views

Remove one's domain from general spam blacklist

We've a problem similar to the question Getting a domain name off of the blacklist but the solutions posted there doesn't help. The problem I'm facing is that our domain is probably marked ...
1
vote
5answers
732 views

What is the easiest to install and maintain email server?

I really don't like administration tasks but i need a VPS (a naked Debian system - no control panels) for some reasons. One thing that scares me is the setup of the Mailserver - never done this before ...