Unsolicited e-mail, comments or posts, often sent out in large volumes.
2
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4answers
2k views
2
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4answers
324 views
My datacenter is unable to add PTR/rDNS record, then how can I prevent the mail outgoing from going to spam folder?
I am having problem that mail sent out from my server all goes to recipient's spam folder.
I am running Drupal sites on Linux server. CentOS w/ cPanel.
Our users cannot receive email as the mail ...
2
votes
6answers
141 views
Does disallowing sending emails via a SMTP server that doesn´t have the same address help preventing spam or is it dangerous?
I am working in a small programming company and administrated the mail-servers for quite a while.
Now we moved our web site and the MTA to a company that we considered to be more professional. But I ...
2
votes
7answers
4k views
all mails going to gmail SPAM (sendmail on centos) 127.0.0.1 problem?
UPDATE ON SPF CHECK http://www.openspf.org/Why:
The SPF check gives me this: An SPF-enabled mail server rejected a message that claimed an envelope sender address of support@ourdomain.com. An ...
2
votes
5answers
298 views
banned IP addresses when buying a dedicated server and email spam
if I rent a dedicated server, and for some reason the IP that I get assigned turns out to be on spam lists, is there any way to clear this up?
If yes, how long does it usually take?
2
votes
7answers
244 views
Which forums systems are known for being good at avoiding spam?
We've been using phpBB3 as the forums for our business, and we've been plagued with spam bots left and right. In the end, I had to scrap the forums entirely because of all the junk. Our business needs ...
2
votes
4answers
875 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 ...
2
votes
5answers
5k views
How do I remove IP from sorbs.net blacklist?
Our email server has ended up in the sorbs.net blacklist and we're going round in circles trying to get it removed, currently this is causing down-time between our suppliers.
I am a developer and not ...
2
votes
1answer
173 views
Issue of tracking an email that was “lost in cyberspace”
The issue here is one of an email that has been "lost in cyberspace." The receiver is claiming never to have received it. However, I recieved an automated out-of-office reply as a response to my ...
2
votes
2answers
170 views
Recommendations for an external email marketing service [closed]
First off, let me say that the small number of emails we send out are not spam. We include removal links and the emails are generally centered around free webinars that our marketing department hosts.
...
2
votes
4answers
651 views
Is OpenDNS safe to use in a location with Exchange/Reverse DNS
I like OpenDNS, but was wondering if anyone has experience deploying it for a location with an Exchange installation. I'm concerned specifically about whether any filtering they do would cause ...
2
votes
2answers
282 views
sendmail is using return-path instead of from address
I have a customer that is complaining about emails marked as spam.
I'm looking at the header. It shows the correct From: reg@company.com
However, it doesn't like the return-path.
Return-Path: ...
2
votes
5answers
2k views
Open Source or lower-cost alternatives to Barracuda Spam Filter
I'm aware of SpamAssassin-based solutions, but I'm looking for a free or low(er) cost spam filtering solution that's similar in functionality to the Barracuda Spam Filter. The Barracuda works well, ...
2
votes
4answers
955 views
trying to set up a newsletter server, hotmail blocks me
I have little experience setting up an email server so I'm having a lot of dificulties right now.
A client from a political party wants to send a newsletter to 8000 people with a very limited budget ...
2
votes
3answers
196 views
Email getting marked as spam by gmail, hotmail but OKed by spamassassin
I am having some issues with emails getting sent from one of my websites using the PHP mailer. When I am using my own email server with spamassassin the emails come through without a problem, but with ...
2
votes
2answers
931 views
spam from your own email?
I have recently been receiving spam that has been listed as my own email address. I remember doing a few telenet emails back in school and know there are some ways to send looking like they are coming ...
2
votes
7answers
2k views
phpBB: How to handle spammy registrations?
I'm managing a phpBB-based forum that gets hit hard by spammers signing up fake accounts. To combat this, we enabled "administrator activation required", but it's not working so well: When a new user ...
2
votes
7answers
683 views
Whether to filter (for spam, viruses) outgoing mail or not?
The purpose of this questions, is to understand pros and cons of filtering outgoing mail.
I am admin of an ISP. As usual, users, who have dynamic IPs, can send mail only with ISP's SMTP server. ...
2
votes
3answers
864 views
Exchange 2007 NDRs
We have NDRs disabled on our Exchange 2007 server to prevent backscatter. Is there any way to enable NDRs only when messages exceed size limits? It can be frustrating for people when their messages ...
2
votes
1answer
40 views
Email rejected as spam goes through on a reply [duplicate]
Having some problems with mail messages which are rejected as spam when sent directly to a user at a certain company address but if that users sends us a message and we reply, it is accepted. If I ...
2
votes
2answers
409 views
Has this server been compromised?
A friend is running a VPS (CentOS)
His business partner was the sysadmin but has left him high and dry to look after the system. So, I've been asked to help out in fixing an apparent spam problem. ...
2
votes
6answers
3k views
how to track down a spamming script?
My server sent 83,000 spam emails last night, I've been trying to track down the culprit, but I'm not sure how to find out exactly.
in the logs the "from" address is always something like @#!
the ...
2
votes
4answers
683 views
Best practices on how to send emails on clients behalf and avoid being black listed
I am starting a business providing some online customer relationship management functionality. I want to allow my clients to create their own email lists.
I also want to allow my clients to be able ...
2
votes
2answers
10k views
How can I track who is sending spam through an Exchange server?
I have an Exchange 2003 server that sent me an email this morning:
SMTP Server Remote Queue Length Alert
Looking in the queues using Exchange System Manager there were just over 16,000 spam ...
2
votes
2answers
356 views
Guidelines for Mail Servers - How to Maximize Deliverability to Remote Inboxes
My non-profit association has an Exchange server and a ListManager server to handle announcements to our members (about 800 email addresses) and several low-traffic discussion listservs.
On the ...
2
votes
7answers
1k 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 ...
2
votes
3answers
603 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. ...
2
votes
2answers
81 views
Barracuda Spam Filtering & Bayesian Learning
I came across best practices from BarracudasNetwork website https://www.barracudanetworks.com/docs/other/barracuda_spam_&_virus_firewall_bayesian.pdf
These recommendations suggest to keep good ...
2
votes
4answers
128 views
Worth deleting email account due to SPAM?
We have a system here in which several accounts get a ton of SPAM and spamd (SpamAssassin) is constantly using a ton of memory. Our machine is used for both our website and our email. Our LAMP based ...
2
votes
1answer
361 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 ...
2
votes
1answer
155 views
How to prevent your mail gateways from being blocked due to spam being sent via mail forwarding
We allow users to forward their e-mail to external addresses.
From time to time, our mail gateway appliances' anti-spam engine computes a large spam campaign targeted to our users as a ...
2
votes
1answer
104 views
Managing an email server - what steps can I take to ensure our emails are delivered
We have developed some CRM software which allows the users (our clients) to send emails to their clients (both individually and as a bulk email-out).
The emails are sent via our email server, but ...
2
votes
4answers
180 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 ...
2
votes
1answer
1k 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 ...
2
votes
3answers
2k views
How do I spamtrap with Postfix?
How do I setup spamtraps with Postfix so clients that send to trapped addresses are prevented from sending me more spam?
2
votes
2answers
181 views
Dealing with referrer spam
One of our primary webservers, which runs Apache on Ubuntu, is coming under attack from heaps of referrer SPAM requests lately. There's enough of this that it is really sucking up our internet ...
2
votes
1answer
62 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
220 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
2answers
88 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
140 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
115 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
3answers
961 views
Can any postfix guru assist me determine how emails are still being sent via my server from unauthorized sources?
I'm getting a little concerned as I run a small server hosting a number of websites and manage the email for a few dozen people.
Just recently though I've had a couple of notifications from spamcop ...
2
votes
2answers
978 views
dspam vs spamassassin vs bogofilter
I just wonder what their pros and cons are, and which is better for production use. Thanks~
2
votes
1answer
115 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
3answers
194 views
Emails from custom domain going to spam
I just bought a custom domain that I'm trying to use as my primary email address. However at the moment many of my emails are landing in people's SPAM accounts. Are there any cheap ways around this ...
2
votes
3answers
4k 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 ...
2
votes
5answers
413 views
Spam and anti-virus on Exchange 2007?
I've found a number of solutions. They all say that they're the best (of course they do!) but they all can't be so I'd like some impartial advice.
I would like to know your experiences of spam and ...
2
votes
4answers
244 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
2answers
41 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
130 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 ...
