Spam can refer to: Junk e-mail Unwanted posts on a website Unwanted comments on a post on a website A large number of spam posts designed to crash a system
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9 views
Proper configuration for Windows SMTP Virtual Server to only send email from localhost, and tracking down source of spam emails
We manage a server that is hosted on Amazon EC2, which has web applications that need to be able to send outgoing email. Recently we received a notice from Amazon about possible email abuse on that ...
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3answers
45 views
smtp 554 rejected - poor reputation
My SMTP (e-mail server) do not send e-mails for 99% of the tries.
Log SMTP server hMailServer:
"SMTPD" 1092 17 "2012-02-09 12:55:20.328" "173.44.33.116" "RECEIVED: DATA"
"SMTPD" 1092 17 ...
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votes
1answer
55 views
My debian server is sending spam, and I don't know why :(
I got my first dedicated server a couple of months ago, using it to learn Linux and server admin, and to host a couple personal sites. I'm very new to Linux, so I used examples and tutorials found ...
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votes
1answer
20 views
SMTP filtering proxy
I provide SSH shells to a lot of people and block port 25, 465 and so on by default via iptables to avoid that some people send spam messages.
Is there some kind of SMTP filtering proxy or -gateway ...
0
votes
1answer
26 views
Setting SCL value on emails in exchange 2010
Emails on my Exchange 2010 server do not have a SCL value or X-MS-Exchange-Organization-SCL: in the email header.
Does anyone know how to enable this so I can filter spam from my users
Thanks
2
votes
1answer
42 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 ...
0
votes
1answer
24 views
Media Temple, SPF, and Changing IP Addresses
OK...so I have a hosting account with Media Temple and recently had problems with mail servers marking my sent emails as SPAM. I looked into the issue and read it's a good idea to implement SPF which ...
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1answer
38 views
Common ways of spam files ending up in a web directory
A friend discovered a bunch of spam files in his web directory on his web host the other day. He has no idea where they came from, and I'm not quite sure either.
What are common security breaches ...
2
votes
1answer
197 views
Barracuda tagging email with 'date grossly in the future.'
I have a Barracuda 300. Granted it's running on some old firmware and the Energize updates are quite outdated. I'd like to update them, but, not my financial decision to do so.
Starting around the ...
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1answer
46 views
Figuring out spam source
Few months ago, my host reported spam going from one of the 3 ips on our server. The host null routed the ip and all was good. We didn't have anything hosted on that ip so it wasn't a big deal.
The ...
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2answers
41 views
How can I filter spam from yahoo's servers?
In the last few months my mail server has been getting massive amounts of spam from yahoo.com's mail servers. Each one appears to be from a different Yahoo mail free account.
The spam is all coming ...
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1answer
93 views
How do I block multiple users on MediaWiki?
My wiki collected a lot of spam over the past few months, so I've blocked it to only registered users. Unfortunately I never turned off user registration.
Is it possible to block a lot of user ...
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vote
2answers
68 views
Exchange 2010 forwarded emails by external servers being blocked
Our users were getting spam messages from their own accounts (same domain/login for example madboy@company.com to madboy@company.com). This is preety standard trick and I decided to block it so that ...
-2
votes
1answer
90 views
Black Listing in outbound relayed e-mail
We send outgoing e-mail with one server relaying e-mail through another server. When e-mail is getting black-listed, is it the originating server that is being blacklisted or the relay?
-2
votes
2answers
67 views
Postifx sends spam. Need to prevent
I have a configured dovecot + postfix + mysql.
Few days ago i have received abuse from DC that i am sending spam.
And really in the /var/log/mail.log i have found records of sending mails not by me ...
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2answers
35 views
Spamassassin/Exim (incorrectly) blocking mail from localhost as spam
On our server we've got a problem with spamassassin/exim4 blocking email from our mailing list software as spam. This because (usually) the headers the software (ecartis) adds add points to make it go ...
2
votes
4answers
131 views
Best practices for spam filtering
I've been running an amavisd-new, spamassassin, postfix setup for a while to help crush spam on our incoming e-mail servers. The setup I'm using is a few years old at this point and its about time to ...
3
votes
1answer
101 views
Will Amazon SES improve spam filtering through typical spam filtering packages
We built web applications which create a fair amount of transactional emails, such as tickets, reminders and logging messages. These emails are typically sent to end users, but most of them are also ...
1
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1answer
115 views
Gmail sends bulk messages sent by postfix to spam - spf, rDNS are set up (headers inside)
here are the headers of the blocked messages (actual domain replaced with domain.com, ip address with n.n.n.n and gmail account name with person.account):
Delivered-To: person.name@gmail.com
...
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votes
2answers
58 views
forwarded email treated as spam
Ive got some issue with email forwarding. Through the ISPConfig 3.0 i've set some email forwards. When I'm trying to send the email on the forward address daemon is returning the message with error ...
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votes
2answers
61 views
Reverse DNS for mail server
I have a question about setting a reverse DNS record for my mail server.
Which is the best way to configure:
1.) The IP address reverses to the domain that is sending the email (ie. ...
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votes
1answer
61 views
Webmin/ SpamAssassin doesn't appear to be 'learning' from forwarded examples of spam
I have spamtrap@ and hamtrap@ addresses set up on my mail server and forward examples of spam to the spamtrap address. I was hoping that after a few examples, SpamAssassin would 'learn' to identify ...
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4answers
51 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: ...
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2answers
59 views
E-mail PTR failure - Spamcannibal
My IP is on Spamcannibal list. So I can't communicate with my registered partners. To be precise I can't send e-mail to only two domain. Everything else is ok.
I try to talk with my domain/server ...
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2answers
185 views
How should I set up my PTR Record?
I am trying to properly set up my ptr record as I have noticed that some email notifications sent from my website have gone to spam for certian people, and I am having trouble figuring out exactly ...
5
votes
2answers
94 views
Can a Barracuda Spam Filter 300 reject mail based on DNS?
Can a Barracuda SF 300 reject mail based on DNS?
Specifically can it respond with a 4XX code for mail claiming to be from a domain without a valid MX or A record (similar to postfix's ...
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votes
1answer
38 views
Blocking External Mail Sent w/ Spoofed Email Address
We recently got an email from an outside server that had a spoofed "From:" header that was the email address of one of our users. Is there a way to have sendmail reject emails coming in from an ...
0
votes
1answer
20 views
Lower SpamAssassin scores when certificate verification fails
I’ve noticed that I’m getting junk mail from Norwegian companies that send from servers that Postfix says failed certificate verification. Is it possible to give these messages a lower spam score with ...
1
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2answers
160 views
What should be the spf record for my domain?
I have my own registered domain.
I have a dedicated IP for my domain.
I use a shared hosting service for my website.
I want to send mail with php's function mail();. I have created one email ...
4
votes
3answers
136 views
With valid SPF my mail header becomes huge -> high spamassasin score
I have a dedicated server with a survey system running on a subdomain. The parent domain is hosted on another server. I send email via google apps.
Reverse DNS is correct.
Without SPF og DKIM, the ...
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votes
1answer
45 views
Spam coming from domain, but from a user that I don't have
I have google apps handling the email for my domain (musikpitch.com). Some Cialis spam got sent with the email address stacee953-camp@musikpitch.com, but I don't' have that user set up. What might ...
0
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1answer
76 views
SQL Server - Bulk E-mail using sp_send_dbmail - how many BCCs to be considered spam?
I use sp_send_dbmail to e-mail to groups of users. There can be hundreds of addresses at a time, all of which I am including as BCCs on one mail. Some users at certain domains do not receive the ...
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2answers
107 views
Indepth Analysis: Prevent mail from being flagged as spam
I want to start an indepth discussion on all ways of avoiding mail being flagged as spam. I have done most of what i knew to prevent mail from being listed as spam. i have tried the following
1) ...
0
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1answer
60 views
Correct SPF for using google-apps with additional outbound mailserver
[Asked this on stackoverflow and was referred here]
We are developing a custom web app for a client. This app is on a separate server, server.com, than the client's web site, www.client.com. Each ...
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1answer
56 views
Processing items with SpamAssassin and sa-learn
I have been working on getting SpamAssassin up and running for awhile now and am pretty close to being finished. However, there is one last thing that is grinding away at me that I can't seem to ...
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3answers
124 views
Make Exim send bounces to postmaster instead of the sender, for non-local sender
I have a few e-mail aliases that forward to external hosts. Currently, if the external host rejects a message, Exim generates a bounce message and sends it to the original sender. This is bad because ...
4
votes
1answer
168 views
Server Sending Spam?
We have some servers hosting websites and email accounts for clients.
Today we found that one of our servers has a very heavy load and by looking at the maillog it is doing a lot of sending to ...
2
votes
1answer
90 views
Why would messages in Exchange 2010 R1 with 0 SCL scores end up in Junk Mail folder?
We have Hub Transport rules that mark e-mail messages with a 0 SCL score if they meet certain criteria. However, some messages that should be caught by these rules are still ending up in the Junk Mail ...
1
vote
3answers
101 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.
...
0
votes
0answers
18 views
Mailserver cant deliver mail to “local” adresses after hostname change
I faced the problem that mails from a server got categorized as spam by certain email providers (GMX).
Therefore I followed some guidelines which did solve this problem
I changed the hostname of ...
1
vote
0answers
22 views
How to use google as a spam filter but also use mailing lists on my own server
I have an existing Linux server that already processes incoming email using some custom email handling scripts (in Perl) that do somewhat complex processing such as routing certain special addresses ...
22
votes
7answers
673 views
How can I attract more Spammers hitting my Spam traps?
Currently I have a number or domains that are set up as Email Spam traps. So if I get mails on that domains I can be certain that it is ~100% Spam. I'm using this information to temporarily defer ...
2
votes
5answers
110 views
What are the different triggers that email servers use to mark email as spam
I believe that all the major email servers will look at the following before they decide to mark a received email as spam or not.
1. Mx record.
2. SPF record.
3. DKIM signature.
4. SMTP ...
0
votes
2answers
106 views
How do I get my server off the ivmSIP/24 blacklist?
I checked my server IP using this tool:
http://www.mxtoolbox.com/SuperTool.aspx
It's come up on the ivmSIP/24 list.
What can I do to get my IP removed from this list? I have SPF records set to ...
0
votes
3answers
64 views
Sending email from a 3rd-party-hosted server
We contracted with a 3rd party vendor to build and host a web application for us. The web app will need to send email notifications out to users when they request it. The application is not hosted ...
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votes
1answer
38 views
Spamassassin AWL: From: address is in the auto white-list
I am not sure what does this flag means in Spamassassin score checking?
My test returned "1 of 5" and mentioned this:
1.0 AWL AWL: From: address is in the auto white-list
1
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3answers
169 views
Prevent Spammers from using my SMTP Queue in Server 2003
I am running Exchange on an installation of SBS 2003 and I have recently run into a problem where random spam queues began showing up in my SMTP queues. I was first alerted to it because my antivirus ...
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0answers
41 views
qmail stat of plesk server
Qmail server on centos 5 with plesk 9.2 , rejecting mails . I tried to find out relevent logs in /usr/local/psa/var/log/maillog but unable to fetch required data. My requirement is to get list of mail ...
0
votes
1answer
30 views
How to delete (not quarantine) emails from blocked domains using Google's Postini service
In Google's Postini service we have a number of domains in our "Blocked Senders" list, messages sent to us from these domains are automatically quarantined as a result.
What we would like to do is ...
0
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0answers
28 views
Ambition to build a 'resend'-feature on antispam server
I am currently running MailScanner on a server, although considering to replace it by MailCleaner.
I would like to be able to resend e-mail that passes through the anti-spam server. This seems to me ...
