Linked Questions

-1
votes
1answer
947 views

Configuring postfix to fight spam, 2012 edition [closed]

EDIT: This question was poorly asked, later I found another question which answers what i wanted to know: Spam prevention tips for Postfix I'm running a small (20 users, 30 mailman-lists) server with ...
5
votes
1answer
271 views

How to use two mail servers in parallel, if possible?

I basically want to have two separate email servers. The first one is the GoogleApps GMail service, which is for humans to use. The second server would be for sending messages from my application (so, ...
-7
votes
2answers
679 views

Mail server not sending or receiving after removal from barracuda blacklist to white list [duplicate]

Possible Duplicate: mail loops back to myself | postfix Mail server not sending or receiving after removal from barracuda blacklist to white list. I've checked against black lists and the ...
0
votes
1answer
149 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
236 views

IIS6 SMTP server retrying too fast (after 451 greylist)

I have my IIS6 SMTP server with default retry settings of 15 min, 30 min, etc. but under some circumstances it keeps retrying every minute (or less). How can I fix this? I have seen it retry ...
0
votes
2answers
204 views

Many invalid HELO from

I've been recieving many invalid helo requests from a Microsoft domain. I already did send a question about this but they still do not respond. maillog: Jan 14 19:27:14 relay postfix/smtpd[57104]: ...
0
votes
1answer
118 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
1answer
170 views

smtp(s) proxy to monitor outgoing spam

I am looking for a smtp proxy to install on our gateway which should monitor outgoing smtp traffic to identify the source of recently occuring spam attacks from our network. It would be enough if ...
-3
votes
1answer
97 views

Inspecting the E-mail traffic of a Windows Server 2008 R2 [closed]

I have seen that the IP address of my mail server has added to blocked IP address list on http://psbl.org. I am using this server for personal use. So, it is not that much of an issue that I am, as a ...
0
votes
1answer
81 views

Steps to make sure network is not blacklisted…Again

I have an interesting issue. I have a client that just got blacklisted due to spam being sent out over the last 2 days. I have my firewall configured to only allow mail to go outbound on port 25 ...
0
votes
1answer
65 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 ...
-4
votes
1answer
40 views

No way to create an effective spam filter [duplicate]

We are having a big spam problem and we don't know how to resolve it. We have one spammer that send us mail daily. All these emails are from different themes, using different email addresses that are ...
0
votes
1answer
27 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 ...

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