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2
votes
0answers
392 views

Exchange 2007 delivering messages flagged as SPAM

I have an SBS 2008 box running Exchange 2007. Mail is delivered directly to the Exchange machine from the Internet via a receive connector (I have already advised people that it would be better to use ...
1
vote
1answer
153 views

Anti-spam software for Cent OS 4.8 w/ cPanel [closed]

My company has a dedicated server running CENTOS Enterprise 4.8 with cPanel. We host our own websites as well as about three dozen client websites. We recently migrated our clients over from a ...
0
votes
2answers
452 views

What DNS Records / Zones are required for setting up a dnsbl server?

I'm trying to setup my own custom dnsbl server for blocking spam. I have successfully created a server running rbldnsd but am curious about what DNS records I would need to have in place so that my ...
0
votes
1answer
2k views

Linux Exim set return-path header automaticly using from header

I use Exim on a Centos distribution and have some problems with the mail sending. In order to make all the email pass the spam filters the "Return-path" and "Sender" headers have to be attached to ...
0
votes
2answers
102 views

Why is our spamfiltering software client crazy?

What to do? It blocks almost all incoming messages. What to do? It complains about: RDNS_NONE - a host with no rDNS? What is that? BAD_ENC_HEADER FH_DATE_PAS_20XX What does these rules mean ...
2
votes
1answer
377 views

Desperation: All FIVE of my Postini clients' accounts have been deactivated

Note: This is re-telling of a message I just posted to Google's support forums. Well, this week has not been good. I have five clients on Postini. All of the clients accounts were purchased ...
0
votes
2answers
76 views

Help with SPF and Wacky Setup

I am the new system administrator for a company who recently rebranded one of its products. We seem to be having some trouble with our messages being marked as SPAM and from the research I have done, ...
4
votes
2answers
2k views

Postfix: content-filter vs. milter

I have a Postfix mailserver with content filtering using AMaViS via the "content-filter" option of Postfix. Now I wonder whether it would be better to use AMaViS as a milter instead of the contet-...
3
votes
3answers
326 views

Exchange 2007 ineffective spam filter

On a pretty clean 2007 setup, I'm seeing A LOT of mail with senders such as : 0.0011a7f8@roman htyme@14009d3cb93848c 0-lz@14009d3cb93848c 0-5-1@home-4fd909062d 0-td@h109-187-48-125.dyn.bashtel.ru ...
3
votes
1answer
462 views

How can I explain to dspam that the user “brandon” is the same as “brandon@mydomain”

I am using dspam for spam filtering by running the "dspamd" daemon under Ubuntu 9.10 and then setting up a Postfix rule that says: smtpd_recipient_restrictions = ... check_client_access pcre:/...
2
votes
1answer
3k views

Is there any way to see why Outlook's client junk mail filter is marking a message as spam?

I have some users running Outlook 2007 connected to an Exchange server, and they're complaining about mail ending up in their junk box. There's no X-SCL tag in the mail headers so this filtering must ...
1
vote
2answers
285 views

Why are default spamassassin rules not being applied to emails we generate?

My company uses a standalone spam-assassin install to test marketing emails, however, mail originating from us does not seem to run the full gamut of test. For example, Spam assassin has a default ...
0
votes
2answers
552 views

spamassassin --lint and spamc return different scores

I'll keep this short and sweet. spamassassin --lint -D < email_message_to_test.eml Returns: [22154] dbg: check: is spam? score=4.205 required=5 Which is an entirely reasonable score, it is in fact ...
0
votes
3answers
528 views

Testing promotions against spamassassin, scores lower than expected

I recently setup a local installation of spam assassin for testing promotions as we want to catch any spam false positives before we mail our customers (This email is opt-in). We even added several (~...
0
votes
1answer
1k views

Qmail & SPF - deciphering the log files

Can someone help me decipher whats going on in these log files? I've added my own comments there, but as I'm not experienced mail admin I could do with an experienced eye ;) The bit which gets me is ...
2
votes
2answers
15k views

How do I find out what a Spam Custom Rule is?

We use a Barracuda Spam Filter at work, and we also provide a mass emailing program to some of clients that send out newsletters. Lately one of them's been composing his latest company newsletter and ...
1
vote
4answers
6k views

Filtering spam to an IMAP folder with postfix, policyd and amavis?

Using amavisd-new, I'm successfully marking multiple headers and accurately reporting most spam. However, right now I'm delivering it to the inbox and I would like to have a Junk folder instead. ...
1
vote
2answers
2k views

Can IIS automatically block IPs based on certain queries?

Can IIS7 automatically block IP addresses if certain queries are tried against my server? Like, is it smart enough to figure out that it's getting spammed by similar requests from the same IP under a ...
1
vote
1answer
411 views

McAfee Secure Messaging Service / Postini: false positive?

I'm puzzled by this email message that gets quarantined by McAfee Secure Messaging Service (it's based on Postini) for no reason that I can think of. Here are the Postini headers: X-pstn-2strike: ...
0
votes
1answer
889 views

Whitelist an address in Trend IMSS 5.7

Trying to whitelist an incoming address in Trend IMSS v5 - in practice, emails from this address will have an attachment & we want the message / attachment to bypass the existing 'executable ...
53
votes
6answers
88k views

How to send emails and avoid them being classified as spam?

This is a canonical question about how to handle email sent from your server being misclassified as spam. For additional information you may find these similar questions helpful: Best ...
0
votes
2answers
189 views

Using spamassassin as an external filter for a web forum

Has anyone tried anything like this? My plan is to do something like this: When a forum post is submitted, instead of immediately saving it to the database, send an e-mail to a reserved account. ...
3
votes
4answers
456 views

Hosted Anti-Spam Service vs. Anti-Spam Appliance

We're currently using Content Catcher, a hosted spam solution. For less than what we pay them per year, we could purchase an anti-spam appliance to run in house. From a simple dollar perspective, it ...
0
votes
2answers
781 views

Exchange 2003 not processing some email marked as spam by Brightmail

Environment: Exchange 2003 Front-end server running Brightmail 6 Exchange 2003 Back-end server with mail stores etc. Spam is properly tagged by brightmail in header with flag 'X-bmifolder: 1' In ...
23
votes
4answers
9k views

Best Practices for preventing you from looking like a spammer [duplicate]

I'd like to feel more confident setting up mail for my clients with regards to false positives. Here's what I know: SPF records are good, but not every spam filter service/software (SFSS) uses them....
1
vote
5answers
511 views

DNSBL - Email Servers Spam

I'm currently doing research on a better way for emailing customers our news letter and not using an ESP such as vertical response since most users there use purchase list and ruin the shared IPs for ...
4
votes
4answers
13k views

Message Queue building on Barracuda Spam Firewall

I have just installed our new Spam Firewall, and all seemed well. But the Spam Firewall has now decided to put all mail in a message queue and I have no idea how to force it on or anything as there ...
2
votes
1answer
2k 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 ...
0
votes
2answers
99 views

Is This Feasible - Running MailWash on a dedicated machine to pre-check

Is This Feasible - Running MailWash on a dedicated machine to pre-check 80-100 email accounts before end-users check with Outlook? We have some major SPAM issues at my company with some users ...
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 ...
0
votes
2answers
149 views

how to enable bounceback on internet facing linux email relay w/ Exchange 2000 backend

I have to use a Win2k/Exchange 2k setup for our companies mail. There is no way to change or upgrade that. Due to various hacking & spam scenarios that played out, we implemented a linux based ...
3
votes
8answers
3k views

Block spam by using geoip filter?

We are looking for a way to be able to block spam based on geographic location by filtering using geoip. context: we rarely have any email correspondence outside of the USA, so we would like to block ...
1
vote
2answers
1k views

How can I setup RBL on Plesk? [closed]

Anyone know how to setup RBL in Plesk? I've Plesk 8.3 with a Centos 5 installed on a VPS. The Plesk panel setup only few option but no RBL. I already have Plesk configured with Spamassasin over Qmail....
3
votes
3answers
1k views

How do you configure sendmail to reject Email with a Date header too far from real time?

A friend of mine using (I believe) qmail has it configured to reject, as SPAM, any incoming Email with a Date: header that is too far from real time. I can't figure out how to do this with sendmail. ...