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

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2
votes
1answer
192 views

Iptables rules order

I have following script, which I found somewhere in the Internet, and I modified it a little bit to suit my needs. My question is: If I understood output of iptables-save my iptables rules are ...
2
votes
1answer
3k views

Whitelist rule for reject_rbl_client in Postfix?

Is there a way to add an exclusion/whitelist rule (or similar), which would work against reject_rbl_client behavior? I have a postfix service running, with following client restrictions: ...
2
votes
3answers
2k views

Where can I find a list of IP addresses of hosting providers?

I am attempting to fend off a spam attack against a web api I run and would like to obtain a list of IP addresses of public web hosting providers from which spammers are launching their attacks. I'm ...
2
votes
1answer
401 views

Mail Server on Google Apps, Hotmail Blocks

My company provides private research tools (sites) for companies. Each site has its own domain name and users. These sites need to be able to send outbound mail for notifications such as password ...
2
votes
1answer
1k views

Log with iptalbes which user is delivering email to port 25

Because we got blacklisted on CBL I set up the following firewall rules with iptables: #!/bin/bash iptables -A OUTPUT -d 127.0.0.1 -p tcp -m tcp --dport 25 -j ACCEPT iptables -A OUTPUT -p tcp -m tcp ...
2
votes
2answers
164 views

Domain name in email body considered spam

I had a customer domain who got their password compromised and spam was sent from their email account with links back to drive-by files that had been uploaded to their web space. The server ended up ...
2
votes
1answer
193 views

Will using google apps emailhosting get rid of blacklisting caused by a shared server account?

a client`s email addresses are constantly blacklisted due to other users who share the same server. the hoster does want him to switch to his own dedicated server, so he gets his own ip. my question ...
2
votes
1answer
1k views

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 ...
2
votes
1answer
161 views

Sending email from specific vhost, bad for spam?

Essentially, I have a server that contains many vhosts. One vhost in particular is required to send mail from the address invitations@vhost.com, however the reverse DNS for that server resolves to ...
2
votes
1answer
162 views

Set up a Fax server to filter spam

At my work, we have a huge costly multi-function printer that does everything a printer can dream of. It is hooked up directly on a dedicated fax telephone line. Now we receive an increasing amount of ...
2
votes
1answer
766 views

How do I manage multiple mail store servers?

I have a mail server for a domain foo.com. Currently all users’ mail box is also in the same server. Now my office is starting its operation in multiple Countries. How can I have mailbox store of the ...
2
votes
4answers
277 views

What is the best way to deal with spam or virus infected hosts in wireless network with personal laptops?

What is the best way to deal with spam or virus infected hosts in wireless network with personal laptops (like personal students laptops in university)? What polices and tools use your company?
2
votes
1answer
34 views

Can IP reputation be affected due to automatic forwarding?

I am hitting a dead wall with the support team of my email hosting provider. The IP they assigned me was blacklisted and so sending emails to AOL.co.uk end up getting rejected. After several emails ...
2
votes
1answer
139 views

Postfix Limit mail for domain from IP range

I have multiple domains and email accounts on my postfix server. All of them get slammed with spam despite all my attempts to get it under control, I broke down and started paying for a pass external ...
2
votes
1answer
109 views

Office 365 - Exchange Online - any way to block false URL spam?

I've already asked this with Office 365 support but unfortunately I didn't really get anywhere this time due to the language barrier. They tried to tell me how to block it with a check box on the ...
2
votes
1answer
172 views

SPF issue with SpamAssassin

I have an internal management app for a small company, written in Python and running on a Linode VPS, with which users can send occasional emails to their customers. The emails are quite ...
2
votes
1answer
69 views

Simple command line plain text spam or ham classifier

I have a load of database entries that have been saved that are full of spam. I would like to be able to pipe the text output of each into a spamassassin or similar tool to be able to get a score on ...
2
votes
1answer
2k views

How to stop double-bounce FROM sender in postfix

I am getting huge amount of these in my mail log, and unable to find its originator. What could be the reason? Here is log entry: postfix/cleanup[9626]: 4413082E40: ...
2
votes
1answer
57 views

Simulating spam request?

I'm trying to test out some blacklist directives that I've just implemented., Is there a way to simulate spam requests?
2
votes
1answer
1k views

Exchange Server 2010 Relaying Spam

Recently I began receiving AOL spam feedback reports from our exchange server. As I investigated I found that hundreds of spam messages were being relayed through our exchange server. Although I am ...
2
votes
2answers
105 views

What is the Value of using DKIM to sign mail when the from header doesn't match?

My domain is domain.tld, where I have DKIM functioning just fine. All of my domain emails are signed, and pass. I have a need now to send mail on behalf of my customers occasionally - ie: send email ...
2
votes
1answer
362 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
180 views

Automatically reject any mailman mailing list posts that contain Russian?

I'm running a small mailman-based mailing list on a Linux server, and the only spam posts we seem to get are in russian. They are automatically moderated of course, since they're not subscribed to the ...
2
votes
1answer
243 views

How do I configure my domain and web application so the emails send from the latter are not blocked as spam?

I have a WordPress site that needs to send notifications to an email address. I would like the from field from this emails to be an address on my client's domain. I dont know much about email ...
2
votes
2answers
10k 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 ...
2
votes
1answer
252 views

SMTP Send Queue growing due to possible DHA attack?

GroupWise 8 SLES So.. my email server's send queue is currently at 20,000+ emails and growing. Log files are full of this type of thing: 18:48:14 840 MSG 1401510 Converting message to SMTP: ...
2
votes
2answers
585 views

Outbound business email being marked as spam in other organizations

Wanting to make sure I've done everything I can to prevent our legitimate email from being incorrectly marked as spam by other companies: Exchange 2010 with SP1, no major changes in 6 months. I've ...
2
votes
1answer
728 views

Mail classified as spam, but passes SPF and DKIM

I have configured Postfix to be responsible for subdomain.example.com (google apps is responsible for example.com so I didn't want to mix the two). As I mentioned in question title, SPF and DKIM ...
2
votes
3answers
712 views

Force Apache2.2 to drop a request

Long story short we recently had an account on one of a shared hosts compromised, the issue has been resolved but the affected account is still being spammed with over a million requests a day to a ...
2
votes
2answers
201 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
186 views

Do I need to leave SPF TXT record for backwards compatibility?

There is a dedicated DNS SPF record which can be used for SPF record. However DNS TXT record may also be used for backwards compatibility. If i CAN define SPF record - should i just delete the ...
2
votes
1answer
88 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 ...
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 ...
2
votes
1answer
388 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 ...
2
votes
1answer
376 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 ...
2
votes
2answers
344 views

Spam Analysis Tool [closed]

I looked but did not see a question related specifically at spam analysis tools. What I want to do is run our auto generated notification emails through some tools to determine their spam likelihood ...
2
votes
1answer
452 views

Is there any point to Teergrubing anymore?

I'm just installing a new mail server, using Exim 4 and the sa-exim Debian package. Part of the configuration uses Teergrubing (or tarpitting), and while it sounds like a great idea in theory, I also ...
2
votes
2answers
1k views

LDAP query for Barracuda

I have a barracuda spam firewall 300 that I just got installed the other day. I'm working on an LDAP query for using it with my exchange server. What i have so far is: (& ...
2
votes
1answer
640 views

Can I remove emails from /var/spool/sa-exim/SApermreject?

I have a lot of emails in /var/spool/sa-exim/SApermreject. Can I remove these emails or will this lead to some kind of nasty spam problem? Or is this just a history of all the emails that were never ...
2
votes
2answers
245 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
32 views

Sane Spam Strategy [closed]

Right now I'm using spamd to score spam and then procmail to put it in user's .Spam Maildir folder and then manually running sa-learn on .LearnAsSpam and .LearnAsHam and then also manually just ...
2
votes
1answer
59 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
164 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
1answer
4k views

Postfix: Gmail marking my email as spam

I'm been trying to understand why Gmail is treating the email sent from one of my domain/server as SPAM. I found a lot of threads here about this issue, however I checked the usual suspects like ...
2
votes
1answer
1k 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
327 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
200 views

Can someone explain SMTP Callbacks when BATV is enabled, and when to issue the verification?

This Wikipedia article describes how SMTP verification of the MFROM may have issues if BATV is enabled. Servers that reject all bounce mails (contrary to the RFCs). To work around this problem, ...
2
votes
1answer
641 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: ...