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

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4
votes
1answer
898 views

How to stop backscatter email spam

I know I can't do anything about people spoofing my email address, but what can I do about all those annoying bounce-mails? I get 5-10 "Undeliverable mail" a day, but I don't know how I can filter ...
4
votes
2answers
17k views

AOL bounces with: AOL will not accept delivery of this message [closed]

AOL started bouncing emails from my mail server with the following error: 521 5.2.1 : AOL will not accept delivery of this message. 554 5.5.0 Remote protocol error On the troubleshooting page AOL ...
4
votes
2answers
278 views

Running a mail forwarding service, what are some steps I should take to prevent my IPs being blacklisted

Background: I'm about to launch a service which offers email forwarding for a large number of domains. Say you want people to be able to contact you using you@somesite.com, all emails sent to that ...
4
votes
3answers
433 views

How to detect form spamming on your web servers?

If you run hundred of web sites on your servers, what it is the most efficient, automated way to detect if bots are using your HTML forms to send spam email, even if your forms have some kind of ...
4
votes
1answer
4k views

IMAP standard folder names - “Junk” or “Spam”

I am configuring spamassassin at the moment and have been wondering what is the standard (or atleast most used and recognized by most clients) folder name for Spam or Junk? I first used Spam, but ...
4
votes
1answer
2k 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 -...
4
votes
2answers
17k 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 ...
4
votes
2answers
402 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.
4
votes
4answers
3k 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?
4
votes
2answers
50 views

Is it OK to run my own mail server for email forwarding? [closed]

A lot of people advise against running your own mail server; they recommend using a SAS that is more experienced in this area (Google Apps Gmail, AWS WorkMail, etc). I want to run Postfix MTA to ...
4
votes
1answer
2k views

Abnormal sendmail activity using up the server memory on my Ubuntu 12.04 server

Environment Rackspace Ubuntu 12.04 Wordpress MySql The issue I have been experiencing quite serious out-memory-issues in the last couple of days. While I resolved one possible cause the issue I ...
4
votes
2answers
2k 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 ...
4
votes
1answer
409 views

Silently drop OUTGOING mails to us.er.n.a.me@gmail.com (more than 3 dots in username part)

With postfix-2.6.6-2.2.el6_1.x86_64 on CentOS 6.4 is there please a way to inspect OUTGOING mails and silently drop them (i.e. do not send them) if the recipient looks like us.er.n.a.me@gmail.com (i.e....
4
votes
3answers
4k 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 ...
4
votes
2answers
10k views

Gmail.com detect mail as spam, but the server is not on any BlackList

I have an issue with Google. (GMail to be exact) About 1 month ago, we had a security breach, and mail was relayed through our servers. we got listed in almost ALL Black-Lists :( we fixed the ...
4
votes
1answer
616 views

What problems can an ADSP record in DNS cause for mailflow?

ADSP is an entry in DNS that works allows a domain owner to assert that all email must be signed with DKIM. (similar to the -all and ~all in SPF/SenderID). Messages that fail ADSP policy may be ...
4
votes
1answer
1k views

Which RBL's does sophos use?

Anyone know where I can find the a list of which RBL's Sophos use's? I have checked their website with no luck, and currently awaiting a response from their technical support. Thank You in advance ...
4
votes
2answers
12k 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 ...
4
votes
3answers
4k views

Google Apps BCC all Inbound and Outbound email

I am working with a company on a migration from a standard POP3 email provider over to Google Apps premier. The owner of the company currently receives copies of all INBOUND and OUTBOUND email into ...
4
votes
1answer
3k 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 ...
4
votes
1answer
4k views

Forefront Protection for Exchange - Allowed sender still delivered to Junk Mail

I've got a fresh install of Server 2008 R2 SP1, Exchange 2010 SP1, and Forefront 2010 Protection for Exchange. All on the same box, Exchange is CAS/Hub/MBS. This is a testing box, looking to evaluate ...
4
votes
5answers
3k 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 ...
4
votes
4answers
549 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 ...
4
votes
1answer
344 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 ...
4
votes
0answers
82 views

Postfix/Spam Prevention [closed]

How do I make Postfix reject all mails when the client is not authenticated and the sender is from my domain? Is there an easy way to do this?
4
votes
1answer
349 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 ...
4
votes
2answers
5k views

How to read the “MS ForeFront” antispam report in email header?

I'm trying to diagnose why emails I'm sending out from my server's IIS SMTP Pickup Folder are getting bounced back occasionally. One tech from a receiving company who couldn't receive the emails said:...
4
votes
1answer
5k views

Exchange 2003 mail non-delivery (NDR), spam activity? events 7002 & 7004

Windows Server 2003 Small Business Server SP2 Exchange Version 6.5 (Build 7638.2: Service Pack 2) This network has been neglected and has been having email problems for years and was on many ...
3
votes
4answers
677 views

Are 10.10.0.3 and 10.10.0.4 IP's for spammers

I have a site that is getting bombarded by requests from 10.10.0.3 and 10.10.0.4. I couldn't find where these servers are. What is the best way to regulate this? I could just deny those IP's but I ...
3
votes
3answers
680 views

I got these strange messages on my websites feedback form? Is someone trying to hack my site?

I got all of a sudden a number of strange feedback messages from my sites feedback form its where normally users would come and enter feedback and then I would review it on an admin panel. However ...
3
votes
4answers
456 views

Hosted Anti-Spam Service vs. Anti-Spam Appliance

We're currently using Content Catcher, a hosted spam solution. For less than what we pay them per year, we could purchase an anti-spam appliance to run in house. From a simple dollar perspective, it ...
3
votes
7answers
11k 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 SPF-...
3
votes
2answers
2k views

Blocking PHP mailer spam using iptables

I host a public-facing web server running Debian Wheezy, and latest versions of Postfix, Apache, PHP, Spamassassin, ClamAV, rootkit hunter. Apache is configured with a handful of vhosts, each tied to ...
3
votes
1answer
923 views

How did this email bypass my SPF settings?

I received a phishing email this morning that appeared to come from one of my addresses to itself. Looking at the headers, I found something interesting. DomainKey-Status: no signature X-Spam-...
3
votes
2answers
1k 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: &...
3
votes
2answers
169 views

What do these email newsletter services do to prevent their emails from going to SPAM folders?

These email newsletter services probably send millions of emails per day. How do they successfully do this without having their system black listed? Don't services like otmail/gmail block emails if ...
3
votes
2answers
2k views

How to make sendmail accept connections from localhost only

I need to secure the server by making sendmail-mta accept only local connections (from localhost), so that any external (potential spam) connections are denied. I use Debian 7.0 currently.
3
votes
5answers
887 views

How to notify Gmail, Hotmail, etc. that you are a legitimate website sending lots of notification to users

Although I have already done everything, like adding SFP, DKIM and sending plain text in my emails, I want to notify Gmail, Hotmail, Yahoo, and other "big" popular email providers that I'm legitimate. ...
3
votes
2answers
541 views

Is someone using my mail?

I found a whole bunch of this in my maillog (after my site went down from excessive resource usage): Dec 3 05:24:23 mysite qmail-queue-handlers[24524]: from=anonymous@mysite.com Dec 3 05:24:23 ...
3
votes
6answers
9k 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?
3
votes
8answers
3k 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 ...
3
votes
3answers
724 views

Postfix and compromised accounts

First of all, sorry for my English. I think it's very common to set the permit_mynetworks and permit_sasl_authenticated restrictions on first positions of the smtpd_recipient_restriction list, but, ...
3
votes
4answers
497 views

Spamming from my Linux server

Hi I was wondering if anyone could help. I got a email from my host company that there are some weird traffic coming from my server. A quick look into the log file revealed the sample log below. There ...
3
votes
2answers
3k 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 ...
3
votes
3answers
1k 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 ...
3
votes
3answers
1k 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. ...
3
votes
2answers
23k views

Allow email from a particular sender through spam filter

We are running exchange 2010 and are using the built in anti-spam feature. We have set up Content Filtering, IP Block List Providers, Sender ID, Sender Reputation and it filters out most of the junk ...
3
votes
4answers
312 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 end-...
3
votes
2answers
624 views

Postfix - forward rejected by unknown recepients emails to SPAM-learning mailbox

I have Postfix + BitDefender FRAMS running as hygiene gateway before few Exchanges. BD FRAMS can learn it's Baesian filter by download SPAM and HAM emails from dedicated mailboxes. Because we have ...
3
votes
5answers
1k views

How to configure email server to send lots of transactional emails

My organization is currently outsourcing email delivery to an SMTP service provider. We're considering bringing that back in house to deliver our own emails. We send about 5k transaction emails per ...