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

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1answer
357 views

Configure Postini and emailreg.org

One of our companies uses Postini services as our spam filtering service. Unfortunately, the company has been tagged as a spammer and we're trying to use emailreg.org to whitelist us. Emailreg.org ...
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3answers
1k views

How to make spamassasin reject mail based on score?

I am running linux with postfix, dovcot, postgrey and spamassasin/spamd. This is my main.cf smtpd_recipient_restrictions = permit_sasl_authenticated, ...
3
votes
3answers
874 views

How do I prevent mail from my Exchange server from being blocked?

Recently one of our client machines was infected with a virus and I believe was spamming addresses in the user's contact list. Since then our server has been appearing on blacklists and it has been ...
1
vote
1answer
812 views

It's possible to use google smtp for sending email from my server?

Well, I am becoming crazy to let my email deliver to gmail/hotmail from my new ip. Last year, i had no problems with my past ip, but now my emails go straight to the spam folder of gmail and hotmail. ...
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2answers
3k views

Yahoo flagging mail as spam when using relay server

I'm using Postfix to relay mail from my site to my mail server. Mail is received properly at my Gmail and Hotmail accounts - only Yahoo is the problem. The Yahoo mail headers state: Received-SPF: ...
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4answers
2k views

How to send 100,000 emails weekly and avoid being considered spammer

I have a mailing list with 100,000 email addresses, and I have to send it an email weekly. What application/program/webapp/script/etc do I have to use to send 100,000 emails weekly and avoid being ...
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3answers
2k views

Postfix Problem (helo/hostname mismatch)!

I have a server, and it is running a error for one email only (all other mails in that domain are working). How can i fix it? (The error is above:) May 17 11:43:56 webserver ...
5
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2answers
297 views

Attack from anonymous proxy

We got attacked by some very-bored teenagers registering in our forums and posting very explicit material using anonymous proxy websites, like http://proxify.com/ Is there a way to check the ...
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2answers
484 views

Qmail & Open Relay on local domains

I have a dedicated server on 1&1 and I manage it with Plesk. The problem is that if I try to send a mail outside the server, I must to authenticate with the email and the password, but if I send ...
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4answers
187 views

Spam just keeps on coming

I administer a Windows Server 2003 with Exchange 2003 as well as GFI installed. I am watching the GFI dashboard and every third email is spam. Not only that it goes to a non existent address then the ...
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4answers
700 views

Solution for when your website's emails goes into yahoo or gmail spam folder [duplicate]

Possible Duplicate: Dedicated Server emails ending up in Junk It turned out that the previous person owning this ip address that I currently have for my website had spammed a lot! so Yahoo ...
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4answers
2k views

Sending SPAM free mail through my website [duplicate]

I've been battling with this issue for couple of months. I need to send bulk mail (not spam) through my social network to users in situations like newsletters, site invitations (when user imports ...
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6answers
7k views

Emails going to Junk for Hotmail recipients

We send daily mass emails to our customers (~30,000+ emails per day). We have problems with Hotmail users receiving our emails. Sometimes the email goes to the Junk folder, but often it will got to ...
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2answers
2k views

SMTP hacked by spammer using base64 encoding to authenticate [closed]

Over the past day we've detected someone from China using our server to send spam email. It's very likely that he's using a weak username/password to access our SMTP server, but the problem is that he ...
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2answers
121 views

Is it reasonable to check PTR DNS records?

As all mail things change I wanted to get some thought if checking PTR DNS records these days is advisable? 1) I do want to use it if it will actually bring benefit and 2) I do need to keep false ...
0
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1answer
85 views

Spamassassin not work

I set the threshold to 7.5. But this mail still can't work thought will auto spam. Any idea? Thanks. X-Spam-Flag: YES X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on X-Spam-Level: * ...
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7answers
9k views

Why are my mails sent from Postfix recognized as Spam?

I have a postfix mail server for our firm. The mails sent from this server to gmail and yahoo goes in spam. The postfix is configured on our server and it has never been used for spamming. ...
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2answers
629 views

smtp server in iis6/ win2003 - how to prevent hackers/spammers from using it

Anyone have any checklist for securing the smtp server on my web server so no one else can hack it and send spam fro it?
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6answers
992 views

How do you prevent spam being sent by your users?

So, for the third time in about two weeks (maybe less), one of our customers has had their password compromised, and a spammer was sending mail with their username and password using our webmail. As a ...
0
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1answer
41 views

What is the best way to host a web app for a marketer?

I have recently developed a web app for a marketer that he has been sending emails to his potential customers to fill out an application form existing in this web app. Recently, I received an email ...
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votes
3answers
288 views

Can Spammers get your email address if it's set as postmaster, webmaster, etc?

When you set-up a "postmaster" email in postfix/cyrus/dovecot/fetchmail, etc, or a web-master address in an apache vhost, can spammer's query your server and get that information? Or is it only for ...
3
votes
4answers
302 views

Minimize the chance my email is blocked/filtered as spam

I'm running a web-based store where order confirmations are sometimes blocked and don't reach the intended user. The structure of the business model is such that our product is marketed to the ...
0
votes
1answer
376 views

Server and Application architecture for large outgoing email volume

we need to develop an application to send large amount of emails (newsletters) We estimate 15 millions of emails per month (6 - 10 emails per seconds). Would you recommend me the proper architecture ...
3
votes
1answer
5k views

Postfix Whitelist before recipient restrictions

Alright. Some background. We have an anti-spam cluster trucking about 2-3 million emails per day, blocking somewhere in the range of 99% of spam email from our end users. The underlying SMTP server ...
2
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4answers
223 views

Does sending e-mail in the name of customers increase the risk of being marked as spammer?

We are developing a SaaS website application that lets users send invoices to their clients. Ideally, these e-mails should appear to be originating from our customers, so the sender e-mail address ...
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3answers
351 views

Blocking a distributed, consistent spam attack? Could it be something more serious?

I will do my best to try and explain this as it's strange and confusing to me. I posted a little while ago about a sustained spike in mysql queries on a VPS I had recently setup. It turned out to be a ...
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2answers
9k views

Postfix check outgoing mail for spam

How can I force postfix to check (and log/flag/etc) all outgoing mail for spam? Just want to make sure I'm doing my part on my servers. EDIT: Postfix config, as requested. main.cf # See ...
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1answer
496 views

Custom Filter in cPanel to Auto-Delete Emails with Russian Characters

I get a lot of spam to my email account from Russia. The emails themselves (name, subject, body) are in Russian and I was hoping to create a custom filter in cPanel (not in SpamAssassin but in cPanel ...
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3answers
2k views

Email: X-Authentication-Warning

We're sending out 1000's of mails per day from our site (mainly "click here to verify your subscription") and too many are getting flagged by spam (mainly hotmail). One of the things I noticed in the ...
63
votes
9answers
70k views

Dealing with HTTP w00tw00t attacks

I have a server with apache and I recently installed mod_security2 because I get attacked a lot by this: My apache version is apache v2.2.3 and I use mod_security2.c This were the entries from the ...
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1answer
1k views

why my mails from zimbra server to yahoo goes in to spam folder

I just configured zimbra mail server but mail from my zimbra to yahoo, hotmail etc going into there spam folder any suggestion??? bellow is header part from yahoo of that mail X-DSPAM-Result: ...
0
votes
1answer
2k views

I can't send email from my server to gmail addresses

I'm using postfix, and have setup spf, dkim, and domainkeys. I can get my email to go to Yahoo, but not gmail. Here's the headers from an email send to Yahoo. Yahoo reports the email as domain key ...
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1answer
3k views

Why is my Zimbra mail going into the spam folder of yahoo, hotmail etc.?

All mail from my new Zimbra mail server is going into spam and junk folder of Yahoo or Hotmail. Any suggestion to deliver them direct into inbox? Below is the header part of my mail from yahoo... ...
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1answer
1k views

Forefront 2010 Antispam vs Exchange 2010 Antispam?

They look pretty similar, do they work together or independently? For example you have content filtering in Forefront where you can specify SCL barriers, just like in Exchange. However theres no ...
5
votes
1answer
2k views

How do I do an exact whois search?

When I execute the following whois command on my Ubuntu server, I get all sorts of other domains which contain google.com in the name, but clearly aren't owned by google. As this appears to be some ...
0
votes
2answers
563 views

Spamassassin one-liner to tag & move mail with an X-Spam-Flag: YES to a new directory?

Say you have a directory with tens of thousands of messages in it. And you want to separate the spam from the non-spam. Specifically, you would like to: Run spamassassin against the directory, ...
5
votes
4answers
2k views

How do you test a new email filtering system?

What method do you use to test or evaluate potential new email filtering systems before you set it up on your production network? I am particularly interested in methods that are appropriate for ...
0
votes
3answers
5k views

Emails sent through SMTP on VPS are considered to be spam

During our business we have to make regular mailing to our clients: invoices, information emails, etc. Previously we received and sent emails using mail server of our hosting provider. But as the ...
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votes
9answers
2k views

Gmail and Live are making all messages from my server as spam

I'm getting very weird results here. When my server sends an email to my @hotmail or @gmail account, it's marked as spam. When I send email through my server from Outlook to @hotmail, it doesn't get ...
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3answers
5k views

DKIM error: dkim=neutral (bad version) header.i=

Ive been struggling the last couple of hours with setting up DKIM on my Postfix/CentOS 5.3 server. It finally sends and signs the emails, but apparently Google still does not like it. The errors I'm ...
2
votes
5answers
1k views

Google marks seemingly perfect emails as spam

First post - was directed here from stackoverflow! The problem: Google marks seemingly correctly formatted emails from my apache/postfix server as spam. Sample email as follows; (I have replaced my ...
1
vote
1answer
150 views

Anti-spam software for Cent OS 4.8 w/ cPanel

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 ...
3
votes
6answers
6k views

How to check my linux server isn't spamming

I'm worried about dodgy php scripts or other malicious software on my linux server sending out spam. Or maybe I left an open relay What are the ways to check I'm not sending any spam out?
4
votes
1answer
329 views

Indirect Postfix bounces create new user directories

I'm running Postfix on my personal server in a data centre. I am not a professional mail hoster and not a Postfix expert, it is just used for a few domains served from that server. IIRC, I mostly ...
14
votes
4answers
47k views

Fixing My MTA's Poor Reputation

I have a web site that needs to send email to customers to deliver files that they have purchased. Reliable email delivery is vital to this business. Unfortunately, most of the emails sent by my ...
2
votes
1answer
362 views

Exchange 2003 Spamhaus Settings

I have exchange 2003 installed on Windows Server 2003, and I have a Fedora Core 9 machine with nagios installed. I use nagios to send emails about server issues which has been working fine for years ...
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2answers
173 views

Using procmail to remove backdated spam

I started getting spam backdated by a few years. Is there an easy way to detect and divert these to /dev/null using procmail?
2
votes
2answers
2k 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 ...
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2answers
646 views

Please explain my VPS's Mail Queue Manager

On my VPS in WebHost Manager I have an area called Mail Queue Manager. I frequently have a few messages built up in there that seem to contain viruses and other problems. What are these messages, ...
2
votes
1answer
373 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 ...