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

learn more… | top users | synonyms

6
votes
2answers
280 views

Which DNS Black Lists would you recommend to discard spam in pre-queue?

There are many black lists out there, with bad and good reputations. Also, some people recommend to use RBL lists only in score-based systems (like spamassassin) while others (including commercial ...
0
votes
1answer
2k views

Content Filter is enabled and the last definition update was over 12 hours ago

Microsoft Forefront Protection for exchange server 2010 has been installed and I get updates for all of the engines except the spam one. These are the health points I have installed: Spam ...
0
votes
4answers
1k views

Exchange 2007 server send out spam

Our exchange server is sending out spam, as it has been listed on various spam blacklist and not to sure know how to stop it. I've started with verify SMTP with a site like ...
3
votes
2answers
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 ...
1
vote
2answers
368 views

Procmail recipe to block spam faked from domain

I'm getting a high value of spam with the sender faked as my own email address i.e. from name@example.com Now all emails from my domain example.com are sent using a particular server. How can I setup ...
1
vote
2answers
741 views

Should I block all .html attachments in response to recent spam?

I've seen an increase in spam recently, and a lot of it has included .html attachments. Some emails masquerade as bounce messages, encouraging users to open the HTML to see what message bounced. ...
1
vote
2answers
74 views

Users accessing our email when traveling overseas are seeing strange SPAM behavior

I run technology for an international non-profit, so I have users that could be checking their email from Pennsylvania one day, Santo Domingo the next, and Kabul, Afghanistan, the next week. Recently, ...
1
vote
2answers
2k views

Does Google/Gmail & Yahoo/YMail cache DNS information related to SPF?

I am configuring my linode server to send mail from my webapp to users. I could use GoogleApps, but the 500/day limit it too restrictive, hence I'm attempting to set it up myself. I set up Exim4 on ...
2
votes
1answer
87 views

How to send emails for our clients with multiple domains so that reply goes to our clients?

I am planning to do an email marketing as a service to our existing clients. We service mortgage and real estate agents and we do mailings to consumers on behalf of LO and agents. What I would like to ...
4
votes
4answers
498 views

Spam from my server [closed]

I have exim and dovecot on my server installed with directadmin. Some users use it to send spam. How can i disabled this and remove my server from abuse. info from mainlog 2010-07-07 13:00:16 ...
1
vote
3answers
994 views

blacklisted exchange 2003

Our firewall failed about 3 weeks ago and while it was being replaced we were placed on the “cbl.abuseat.org” spam blacklist. Once we got the new firewall in and configured we were able to get ...
4
votes
2answers
96 views

Spam addressed to a sender but received by everyone else

Spam's been getting through Postini lately that's addressed to a recipient (bob@example.com) in the To: field and in the headers. While this isn't that strange -- we've had spam get through before -- ...
0
votes
2answers
275 views

Do I need to enable TLS support for postfix?

I need to send out notifications from my web-app and I've setup postfix as a null client on my server. So in my /etc/postfix/master.cf I have commented out the lines #smtp inet n - ...
1
vote
2answers
685 views

“Relay access denied” overflowing postfix mail.log

My mail.log is overflowing with random spammers attempting to send spam through my server. Is this typical or have I misconfigured something? Is there a way to ban an IP after several attempts of ...
1
vote
1answer
1k views

How do I know if our emails are being marked as Spam?

We host our site on Amazon EC2. Our users subscribe for weekly email alerts. Since many IPs with EC2 are with a history, to make sure mails are not marked as spam, we use a third party SMTP service. ...
1
vote
2answers
84 views

Anti spam on Exchange 2007

I have just installed an exchange 2007 server. We are not using the edge server role. In Exchange 2007 are there enabled any out the box anti spam features? I can't see antyhing relating to anti spam ...
0
votes
2answers
381 views

spamassassin attachment scanning

I have just started using spamassassin for my email server. I am unable to find an answer for following questions: Does spamassassin scans attachments? If not, what plugins can be used for the ...
3
votes
3answers
1k views

Sign multiple domains with single Domain Key (dk-filter)

Motivation The private shopping website GILT, send periodical update emails from giltgroupe.bounce.ed10.net however all of the mails are signed with domain keys of giltgroupe.com. mailed-by ...
5
votes
2answers
3k views

Why an empty MAIL FROM address can sent out email?

We are using Smarter Mail system. Recently, we found that hacker had hacked some user accounts and sent out lots of spams. We have firewall to ratelimit the sender, but for the following email, the ...
0
votes
1answer
168 views

Does RDNS for mail server have to match the mail server hostname exactly?

Typically when setting up a mail server, I create an rDNS record for the mail server IP to match the mail server hostname (ex: mail.example.com). Can I instead set the rDNS ptr to match the parent ...
1
vote
3answers
65 views

does it still have any sense to directly drop mails that trigger RBLs?

Once upon a time, using RBLs to drop mails was actually a good idea. These days seems it is no more possible for a reason or the other, so every one switched / is_switching to just use RBLs as another ...
0
votes
3answers
100 views

Does “From” field have to have the same domain as the reverse DNS to not be considered spam?

I have 2 applications at the same IP with 2 different domain names. Hourjar uses noreply@hourjar.com for the "From" field when it sends emails, and Nimikri uses noreply@nimikri.com. If my my reverse ...
4
votes
2answers
364 views

Blackberry & SPF

Some users on my domain use a Blackberry for email. Should Blackberry's servers be included somehow in my SPF record? Thank you much for any advice.
1
vote
1answer
165 views

Preventing Email Spoofing

I use Google Apps with my domain. Recently, we have begun to receive spam that gets past Google's spam filters. They are from our own email addresses. I am wondering how to prevent this kind of ...
1
vote
1answer
60 views

Connection Filtering with Multiple DNSBL's?

Is there any advantage or disadvantage to using multiple DNSBL's with ones connection filtering? I just switched from SpamHaus to BarracudaCentral but have added in SpamHaus to test for increased ...
0
votes
1answer
133 views

Protecting Windows SMTP service against the spam

I'm trying to use a Windows SMTP service on Windows Server 2008, but I can't understand how to secure it. Basically, if I keep Connection and Relay settings of SMTP Virtual Server to "All except the ...
4
votes
5answers
2k views

Why are emails sent from my applications being marked as spam?

I have 2 web apps running on the same server. The first is www.nimikri.com and the other is www.hourjar.com. Both apps share the same IP address (75.127.100.175). My server is through a shared ...
9
votes
2answers
17k views

How do I check a reverse PTR record?

I need to check a reverse PTR record to make sure that a script I have is sending emails which will actually received by my users and not incorrectly marked as spam. I understand that the ISP which ...
0
votes
1answer
359 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 ...
0
votes
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
949 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
825 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. ...
0
votes
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: ...
5
votes
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 ...
1
vote
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
votes
2answers
304 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 ...
0
votes
2answers
489 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 ...
1
vote
4answers
189 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 ...
0
votes
4answers
701 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 ...
1
vote
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 ...
5
votes
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 ...
0
votes
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 ...
1
vote
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
votes
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: * ...
1
vote
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. ...
0
votes
2answers
665 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?
1
vote
6answers
1k 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
votes
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 ...
2
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
305 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 ...