Linked Questions

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votes
1answer
16 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 ...
0
votes
0answers
11 views

EXIM alloying in spme despite strict rules [duplicate]

Here is a copy of a header from a recent spam e-mail: Return-path: <Deals---Alert@headja.cricket> Envelope-to: user@domain.tld Delivery-date: Tue, 07 Apr 2015 22:58:51 +0400 Received: from ...
1
vote
2answers
163 views

DNS and SPF configuration for Microsoft Exchange

We've started receiving spam with spoofed addresses from our own domain. So I'm trying to get my PTR and SPF records etc correct to prevent it. We're running Exchange 2010 on site with one server ...
1
vote
2answers
88 views

How to block IP addresses from port 25 [closed]

PROBLEM: Users are getting 15-20 SPAM emails per hour, even with SpamAssassin set to its most aggressive settings SOLUTION: SPAM filtering services are available from companies like McAfee (Intel). ...
0
votes
1answer
31 views

Blocking spam with SpamAssassin [duplicate]

I have a server that runs websites and exim for e-mail. I've added countless RBLs including barracuda to try and cut back on incoming spam. However, they still keep coming in. The clients use ...
0
votes
0answers
10 views

getting lots of spam from “unknown” and helo localhost [duplicate]

On our server, we keep receiving spam with the following headers. We are using whm 11.44 and exim. Return path is always: Return-path: <> and it says Received: from unknown (HELO localhost) Both ...
0
votes
1answer
35 views

I guess that my mail server is unprotected and spammers are using my mail server to spam myself [duplicate]

Since I switch to my own mail server (I folowed this two tutorials: https://www.linode.com/docs/email/postfix/email-with-postfix-dovecot-and-mysql and ...
0
votes
1answer
222 views

Postfix forwards to Gmail being rate limited even with unmodified headers

I've installed Postfix on Ubuntu 14.04 with the defaults. I then configured some virtual aliases to forward email from a few addresses to various personal (mostly Gmail) accounts. This is just to make ...
0
votes
1answer
82 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 ...
20
votes
3answers
1k views

What are the best methods for catching snowshoe spam?

I'm using Smartermail for my small mailserver. We've been having a problem lately of getting waves of snowshoe spam that follow the same pattern. They come in batches of 3 or 4 at a time. The ...
4
votes
1answer
233 views

Does postfix reject spoofed senders?

Is there a reliable way to reject incoming mails with a spoofed e-mail address? What kind of checks does postfix run normally on incoming mails? does postfix check the reverse dns by default? does ...

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