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-2

You could publish a GPO to all clients which configures the junk email settings. "Specify path to Safe Senders list Properties" and Deploy such a SafeSenderList.txt to all Clients which have all your "Safe Senders" in it.


1

Your DMARC record should be under _dmarc.procrastination.com. This is a new specification and not widely supported. If you want reports you also need a TXT record containing v=DMARC1 at *._report._dmarc.procrastination.com or procrastination.com._report_dmarc.procrastination.com. You will know this is working when you start getting reports. Both Google ...


5

You cannot compel others to filter their incoming mail based on SPF and DKIM, or indeed any other criteria at all. If google chooses to ignore SPF, so be it; you've done your bit, all you can do now is sit tight and ignore any complaints from people who don't filter on SPF. That said, having a valid SPF record does tend to reduce backscatter, because a ...


2

I've battled with a couple of these (or similar) scenarios on servers with hundreds of applications, and found the easiest way to narrow/track them down was using Sysinternals Process Monitor: Find the smoking gun: Open Process Monitor and have it show only Network Activity Filter for process name w3wp.exe (if running .NET or ASP applications) If you ...


1

In general it is not possible to easily determine why a particular message has been marked as spam by the Google Mail spam filters. Having said that however one item that is an easy test is to check whether admin@domain.com is in your recipients contact list. Contacts are far less likely to have their emails marked as spam. You should also review the bulk ...


0

RewriteCond and RewriteRule can also be used in server config. Something along the lines of RewriteEngine On RewriteCond %{HTTP_REFERER} ^http://(.*\.)?example\.com [NC] RewriteRule .* http://127.0.0.1 [R=301,L] in your server config should do the trick. For this to work though you have to add this to every VirtualHost you want to apply the global ...


0

You'd be surprised how many people see an unknown referer in their Google Analytics and turn to online forums asking why this particular website is referring traffic to them. In the process, they post a link to the referer in question, and the referer often gets a free dofollow link! I discovered this by googling one of the offending domains myself and ...


1

It can be a brute force mail address scan: someone is trying thousands of destination email addresses in the hope to distinguish non-existent emails addresses (for example, due to destination mail server replying with "unknow user" error) from existent (and active) ones.


2

When you relearn SpamAssassin that a message should be spam it should flip the message over from ham to spam or spam to ham. The problem is that SpamAssassin learns about the message on your relay host, but when it is forwarded to your Exchange server the headers have changes since an addition Received line was added. You could give it a try by adding the ...


3

Something weird is going on on my mail server. I was mailing a friend and my mail bounced because the IP of my server had been blacklisted. It appears like my server is being used for relaying spam mails. (see excerpt from log below) Yes it is I've checked my settings and they shouldn't allow relaying (see below). I've also checked with several ...


4

You're confusing open relaying and authenticated relaying. All email servers support authenticated relaying, which is when a user authenticates to the server for the purpose of sending email to external recipients. The server says "OK, you're allowed to use me to send that email for you because you've been authenticated." (otherwise nobody would ever be able ...


3

If your server has been compromised, the intruder may not be using services that log where you can see those logs. If you're getting complaints from your provider about spam being sent from your server, I would take them seriously and assume that the server has indeed been compromised. To anticipate your next question, see How do I deal with a compromised ...


1

I know that it might be annoying. Still the answer to your question is: No. You cannot just add a huge company to a block list based on your own opinions. Someone actually wants to get email from LinkedIn. Nor is there any list that is The Spam Blacklist that would solve the problem. You need to make the configuration locally on your server. Since you ...


1

If your email is behind exchange server and have spam filtering system, you can block emails from that email but this will effect the whole organisation. Unfortunately, you can't put it on a universal blacklist and you don't want to do so either as there will be thousands of people waiting for an email from linkedin invitations. Or you may just mark email ...


0

Only thing left. The email content. If a image only crosslinked in exemple to somewhere, it will trigger a bad spam quote.


0

Tips to make sure your mail doesn't go to spam: Make sure the plain text and html mail contain the same content Use DKIM Don't use "test" in the body/title (I've noticed from personal experience this does not help your spam score) To test, create a new gmail account and see if the message gets into the spambox Send real messages when testing, short ...


1

If you are going to send from their mail servers, and have a spare IP address available, I would recommend using an alternate IP address instead. That way, if there is any fallout and you are blacklisted for whatever reason, at least it won't affect the IP address(es) used by their mailservers.


4

While a large number of bounced message can surely raise some concerns by antispam services, typically this is only one of the input used to determine if a server is sending spam. I think that if you spread your massive 100.000+ sending in a reasonable amount of time (48+ hours) and all other things as PTR, SPF and similar are OK you should not have big ...


0

Anvil does logging for postfix , Ive added below to main.cf and seems to work for me #### Prevent server sending excess mail from clients add to /etc/postfix/main.cf #### anvil_rate_time_unit = 60s anvil_status_update_time = 120s smtpd_error_sleep_time = 2s smtpd_soft_error_limit = 10 smtpd_hard_error_limit = 20 smtpd_client_message_rate_limit = #### End ...


3

I would search for some of the excellent answers on http://webmasters.stackexchange.com/ but simply put most people use log analyzers to generate visitor stats. Most log analyzers convert those referers to active links and too many people don't shield their stats pages, so when indexed your spammer gets pageRank At least that was the reason more than a ...



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