Fighting Spam - What can I do as an: Email Administrator, Domain Owner, or User?

Posted by Chris S on Server Fault See other posts from Server Fault or by Chris S
Published on 2012-08-20T20:30:19Z Indexed on 2012/08/31 3:40 UTC
Read the original article Hit count: 529

Filed under:

email

|

spam

|

spf

|

dkim

This is a Canonical Question about Fighting Spam.

Also related: How to stop people from using my domain to send spam?

There are so many techniques and so much to know about fighting SPAM. What widely used techniques and technologies are available to Administrator, Domain Owners, and End Users to help keep the junk out of our inboxes?

We're looking for an answer that covers different tech from various angles. The accepted answer should include a variety of technologies (eg SPF/SenderID, DomainKeys/DKIM, Graylisting, DNS RBLs, Reputation Services, Filtering Software [SpamAssassin, etc]); best practices (eg mail on Port 25 should never be allowed to relay, Port 587 should be used; etc), terminology (eg, Open Relay, Backscatter, MSA/MTA/MUA, Spam/Ham), and possibly other techniques.

© Server Fault or respective owner

Related posts about email

CRM 2011 - Workflows Vs JavaScripts

as seen on Programmers - Search for 'Programmers'
In the Contact entity, I have the following attributes Preferred email - A read only field of type Email Personal email 1 - An email field Personal email 2 - An email field Work email 1 - An email field Work email 2 - An email field School email - An email field Other email - An email field Preferred… >>> More
Sending Email in Android using JavaMail API without using the default android app(Builtin Email app

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi Folks, I am trying to create a mail sending application in android, If I use `Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND`); This will launch the builtin application of android, I'm trying to send the mail on button click directly without using this app, Please any suggestions… >>> More
Processing Email in Outlook

as seen on Daniel Moth - Search for 'Daniel Moth'
A. Why Goal 1 = Help others: Have at most a 24-hour response turnaround to internal (from colleague) emails, typically achieving same day response. Goal 2 = Help projects: Not to implicitly pass/miss an opportunity to have impact on electronic discussions around any project on the radar. Not achieving… >>> More
Processing Email in Outlook

as seen on Daniel Moth - Search for 'Daniel Moth'
A. Why Goal 1 = Help others: Have at most a 24-hour response turnaround to internal (from colleague) emails, typically achieving same day response. Goal 2 = Help projects: Not to implicitly pass/miss an opportunity to have impact on electronic discussions around any project on the radar. Not achieving… >>> More
email is moved to junk-email folder even though sender is listed as safe

as seen on Super User - Search for 'Super User'
Using Outlook-2007 : Added a sender as safe sender, but still the email from that id goes to junk-email folder. Tried resetting all settings and restarted outlook . any ideas ? Thanks! >>> More

Related posts about spam

spam spam spam spam [closed]

as seen on Stack Overflow - Search for 'Stack Overflow'
spam removed spam removed spam removed spam removed >>> More
Stop Outgoing Spam Already Tagged as Spam

as seen on Server Fault - Search for 'Server Fault'
Hi, I run a Postfix server with Amavis and Spamassassin among other things. Postfix receives mail from the outside world and passes it on to Amavis. Amavis has Spamassassin rate the mail, and then tags it as spam if necessary. Then Postfix relies on each users' procmailrcs to deal with the mail as… >>> More
spam check, spam score how to?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi. I am doing a app that is sending email and need to have a spam checker on the outgoing email. I have been looking for this a while now, I can not seem to find a good solution. I would like to use something like the spamassassin. Do you guys got any examples how to do the spamassassin with asp… >>> More
configure spam assassin to delete all spam above a score domain wide and override individual settin

as seen on Server Fault - Search for 'Server Fault'
Okay, so this is my scenario and what I want to try and do. I maintain a Red Hat email server running qmail and spamassassin. I have a domain that has well over 100 email account each with individual settings for spam scores and, whether or not to delete email incoming mail deemed spam. What I… >>> More
Make Thundirbird use and sync with Gmail Spam facility

as seen on Super User - Search for 'Super User'
I am using Thundirbird 3.1.7. I am using Gmail with it. When I mark a message as spam in Thunderbird, I want it to go to Gmail's spam folder. But it is not happening. The mail is only marked as spam and stays in Gmail's inbox. How can I setup Thunderbird so that when I mark a message as spam in… >>> More