Linked Questions
84 questions linked to/from Fighting Spam - What can I do as an: Email Administrator, Domain Owner, or User?
111
votes
9
answers
140k
views
How to stop people from using my domain to send spam? [duplicate]
I receive Mailer Daemon messages saying certain emails fail. My domain is itaccess.org which is administered by Google apps. Is there any way I can identify who is sending emails from my domain, and ...
7
votes
6
answers
5k
views
Spam prevention tips for Postfix [duplicate]
Without using SpamAssasin, or similar, what are your best tips for preventing spam.
Please try and provide config examples :D
1
vote
4
answers
3k
views
Prevent spamming [duplicate]
How to prevent spamming in Cpanel / Linux server ?
2
votes
3
answers
8k
views
Should I reject email on SPF and/or DKIM failures? [duplicate]
I’m administering a mail server (cPanel/WHM) running Exim. It handles normally a few hundreds incoming emails per day for our customers.
I’m not sure if I should reject SPF and/or DKIM failures for ...
0
votes
2
answers
2k
views
How reliable is validating email domain by reverse DNS MX record checking [duplicate]
This question is not about how to protect against spam or validate a particular email user. But how reliable is validating emails domain (does it exists at all) by reverse dns. What are the pitfalls ...
0
votes
2
answers
789
views
DKIM, spam probability, signing with key at mail server vs sender domain? [duplicate]
I'm working on an email marketing tool and so far we've been recommending our customers to set up an SPF-record (Sender-ID) and a DKIM-record, we also have our own SPF-record on the mail server and a ...
-1
votes
1
answer
2k
views
Suddenly Gmail and Hotmail block our emails [duplicate]
Starting from yesterday, all emails sent from our server are being rejected by Gmail and Hotmail.
Everything was working properly until now.
Here are the error messages received:
Gmail
Failed ...
0
votes
4
answers
2k
views
Stopping incoming spam with sendmail [duplicate]
I am having an issue due to a "smart" sysadmin that made some choices while I was away for two months: Spam.
I manage probably close to 10,000 web/mail sites. He decided to allow all mail to ...
-1
votes
1
answer
1k
views
sendmail - Server Sending Spam? [duplicate]
for the past day my server is being used to send a spam.
I'm using the Amazon Linux Distro (RedHat based). It has sendmail 8.14.4.
It is setup to require authentication, SSL etc.
Below are some ...
0
votes
1
answer
416
views
Got an Abuse email for spam from my server, but postfix logs don't show them [duplicate]
We have a server with 300+ websites on it, and it has gotten an abuse letter from spamcop. We have investigated the logs, and searched for the PHPMailer version stated in the mail and all came up with ...
0
votes
1
answer
676
views
can someone explain this exim mainlog lines? [duplicate]
i dont understand this lines in exim mainlog , may anybody explain this ?
my server is sending spam and i need to stop it.
2015-04-25 07:51:42 1Ylqf0-0000TF-G1 DKIM: d=mandrillapp.com s=mandrill c=...
0
votes
1
answer
396
views
Project Honeypot says my mail server has become a spammer [duplicate]
I need help diagnosing this: http://www.projecthoneypot.org/ip_66.18.204.186 It says my server has been sending spam for 4 months!
I try to be a responsible mail server admin, I hate spam, I do ...
0
votes
1
answer
311
views
Fixing a server that has been listed an Email Spam [duplicate]
Full Disclosure: Setup of email servers is something fairly new to me, so go easy on me :)
Recently users reported that they were not receiving emails from my site. The site runs a vbulletin forum so ...
-1
votes
1
answer
252
views
How to improve spam protection using postfix? [duplicate]
I try to improve the spam protection of my postfix install for several weeks now, but I still receive spam.
What I've done so far:
Added SpamAssassin
Added SPF record
Tuned rejection rules
Now I'm ...
0
votes
1
answer
224
views
Prevent Email Going to Spam [duplicate]
I've set up my own server and I'm really struggling to stop any outgoing email go to spam.
I've used allaboutspam and mail-tester.com to test it and they both come back with perfect results. No ...