Unsolicited e-mail, comments or posts, often sent out in large volumes; possibly but not necessarily commercial in nature

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0
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1answer
201 views

Sendmail's MTA, MDA and SMTP 550 User Unknown forwarded to postmaster

I have two boxes running sendmail and configured as: MTA accepting connections from the outside world (mta.xyz.com) MDA accepting connections from internal network and storing them in user mailboxes ...
0
votes
1answer
2k views

Zimbra uses other IP than assigned, causing HELO/Reverse-DNS mismatch

We've got a vServer running Zimbra and a web server, each of them having its own IP address. 1.1.1.11 - vServer, running: -- 1.1.1.12/mx1.ipsum.com - Zimbra mail server -- 1.1.1.13 - web server ...
0
votes
1answer
181 views

Postscreen sometimes stops the mail

"The Postfix postscreen(8) server provides additional protection against mail server overload. One postscreen(8) process handles multiple inbound SMTP connections, and decides ...
0
votes
0answers
37 views

Postfix — auto blacklist senders who send to 'honeypot' email addresses [duplicate]

I'm using postfix + spamassassin (amavis) now and I'm trying to increase my hit rate, so I've been looking at the logs to try to see any patterns in email that is obvious spam but gets low scores. ...
-1
votes
1answer
60 views

Configure sendmail to reject emails without from addresses

My MTA is receiving lots of emails with no from address specified, for example: Sep 15 17:09:57 mta1 sm-mta[46864]: STARTTLS=server, relay=mx01.aquila-capital.de [83.236.242.254], ...
1
vote
2answers
579 views

Spamassassin filter systematically produces negative (ham) scores for spam messages

I have problem with lots of spam. My server setup is VPS with CentOS 6.5 and Dovecot+Postfix+Spamassassin. Here is source of one of the messages: Return-Path: <nancy_mitchell@tagbook.co.nz> ...
0
votes
1answer
71 views

Usefull to enter the same RBL's to Postfix and to spamassasin?

Does it make sense to enter the same RBL's in the postfix config under smtpd_recipient_restrictions and also in spamassasin? Would one not be enough? Thanks!
-3
votes
1answer
56 views

Sending emails on behalf of our clients

We wan't to send emails on behalf of one our customer. Previously we were sending those emails using our email address. But last two times we got blacklisted in SORBS database (probably because of one ...
-1
votes
1answer
61 views

Sometimes this script fails to update the iptables [closed]

It does not happen often, but sometimes after running the below script, checking the iptables with service iptables status shows that they weren't updated and the script doesn't output any error. The ...
-2
votes
1answer
26 views

spam email forwarding by server [closed]

Let's start with this scenario: We have a mailbox (i.e. in yahoo), every message is sent by this account, marked as spam by Gmail spam filter. (because the address or sender IP is blacklisted, ...
-1
votes
2answers
401 views

GMail detecting mail as spam [duplicate]

I've been trying for a long time to get our company's mail server send mail that will get accepted by the GMail spam filter. I have managed making it work for Yahoo Mail and Hotmail, sadly GMail is ...
2
votes
1answer
63 views

Training a spam filter based on Mailman moderator's actions?

I'm planning a Mailman server, and looking for a good way to enable list moderators train a spam filter (likely to be either spamassassin or dspam). Has anyone come up with a good way to run training ...
0
votes
1answer
39 views

Spamassasin: Check mailbox for spam

How can I have spamassasin check a mail folder for spam and move it into a different one. I've been getting a lot of spam recently and started implementing bayesian classifiers. I moved a bunch into ...
-1
votes
1answer
337 views

Can't figure out how to properly setup SPF record [duplicate]

I have a Django web app and I use Django's email backend to send out emails. I can't figure out why emails are ending up in spam folder. My domain host is GoDaddy so I added a TXT record ...
-1
votes
1answer
96 views

mail server Best practices PTR and SPF

I have 2 domain names in my server : domain1.com is the main domain that I am using as a nameserver (ns1.domain1.com and ns2.domain1.com) and domain2.com (I am using it to host my web application ...
0
votes
1answer
111 views

Postfix acting as spam server. Looks like it's part of a botnet, spam messages being sent to customers [duplicate]

Let me first start out by saying I am no mail guru. If you need more info to help me just let me know. This week the mail server has been having all sorts of strange issues. It has been duplicating ...
0
votes
2answers
2k views

Use postfix and spamassassin packages on CentOS 6 to reject SPAM - without custom users and scripts

Here is what I'm trying at my CentOS 6.5 Linux server: Installed postfix and spamassassin packages Configured Postfix - it works well (I omit details here) Added -x to the SPAMDOPTIONS in ...
1
vote
1answer
96 views

create safe sender list based on domains of email recipients in Exchange

We're moving from Google Postini to Symantec Cloud as a spam filter. In Postini we've managed to collect a total number of about 3400 domains added over the years to our safe sender list. But ...
1
vote
1answer
157 views

Spam - individual user

I have a bit of an issue with a users inbox in that a lot of spam is getting through for him alone. We use Amavis/Postfix and SA in our mail setup. Config setup like this: Config: ...
5
votes
1answer
332 views

Disable Outlook Web Access Junk filtering in Exchange 2013

By default, Outlook Web Access (OWA) in Exchange 2013 seems to move suspected junk mail to the Junk Email folder. This is undesirable behavior in most of my environments because we have Barracuda Spam ...
1
vote
1answer
121 views

Postfix message ID originating process?

Last night my postfix mail server(Debian Squeeze with dovecot, roundcube, opendkim and spamassassin enabled) started sending out spam from a single domain of mine like these: $cat mail.log|grep ...
-4
votes
1answer
42 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
55 views

How do I block a user doing too many requests without blocking an entire organization?

We have a running website and some of the content comes from a paid API. Our website is free. Our main concern at the moment is people using our website as a "free" way to get at the underlying data ...
0
votes
1answer
143 views

Spam Traffic, DDOS Attack & Server Crashing

I am running phpfox application in my server under my main domain name fetlock.com and I am getting large amount of spam and also suffering from DDOS attacks from multiple IP addresses. My server ...
0
votes
1answer
42 views

SpamAssassin doesn't filter forwarded mails

I am forwarding emails from an external email account to an account on my own server. SpamAssassin works fine if I just receive mail normally. But all mail thats being forwarded from my external mail ...
1
vote
2answers
392 views

exim4 reveals a mail alias when remote server rejects spam

I'm running exim4 (4.76) on Ubuntu 12.0.4.4. exim4 is set up to handle mail for mydomain.com. I have aliases set up that forward a@mydomain.com to b@gmail.com. I have SpamAssassin set up to work in ...
0
votes
0answers
127 views

Forwarding email through a dummy relay to avoid blacklisting

I have a mail server that allows individual users to forward mail to other providers. The server performs the usual anti-spam checks, but spam still gets through occasionally -- especially with the ...
-2
votes
2answers
766 views

ubuntu postfix send mail marked as spam [duplicate]

I set up a mail server, when I give Gmail to send test message is marked as spam system: ubuntu + postfix + dkim + dk + spf + ptr This is the message header Delivered-To: test@gmail.com Received: ...
1
vote
0answers
131 views

Spamassassin && Exim: redirect spam emails

I want to redirect all email, being marked as SPAM to special mailbox. Works with Exim4, SpamAssassin Server version 3.3.1 on CentOS 6.5. Rules from Exim in acl_check_data block: warn message = ...
1
vote
1answer
272 views

Server sending spam - how to find out why?

I have a CentOS 6 on a dedicated server. I'm the only one with shell access to it. I host 2 Wordpress and few simple PHP sites there. My hosting company just emailed me that they blocked my port 25 as ...
0
votes
2answers
93 views

Prevent abuse of sendmail for spam

In web servers that host many websites there is always the possibility of a hacked site being abused in order to send spam mails with some kind of php mailer bot. In my case sendmail is configured ...
0
votes
2answers
138 views

Error sending emails from a mail server relay type falling into the spam folder (using postfix)

Here I show one of the emails that come to Yahoo, which are falling directly into SPAM folder. The SPF goes smoothly, the DKIM passes without problem, even DMARK passes without problem, but just keep ...
0
votes
2answers
992 views

Postfix and Dovecot Sieve spam filter does not work

CentOS 6.5 x64 I'm trying to apply a Sieve filter to my mailserver (Postfix + Dovecot + Spamassassin) to automatically move spam mails to my Junk folder. I've added sieve to my ...
0
votes
4answers
196 views

Create IP nullroute blacklist from text file

I've seen various guides out there for how to nullroute a single IP address, and I've done that before. However, I'm not sure how to nullroute a group of IP addresses. Going through each one ...
-1
votes
1answer
151 views

Prevent postfix sending spam from fake local address

I have an email server Postfix (not open relay) filtered with ASSP (filter incoming mail/connection), but some spammer is sending tons of spam using my email server by using fake local address. This ...
0
votes
0answers
22 views

It's possible to have a Distributed Bogofilter database?

We've Bogofilter running on our AntiSpam system and I would like to distribute it's database through the two MX gateways that we have. I know it's possible using SpamAssassin with a shared MySQL ...
11
votes
2answers
690 views

How can I reduce the damage of stolen mail accounts?

Currently I’m offering some webhosting to a few advertising agencies for their premium customers. But currently I have a great problem with the E-Mail Service. In the last week, the E-Mail Accounts of ...
1
vote
2answers
169 views

Quick/safe way to mass delete SPAM messages from 100+ inboxes

Looking for a way to delete all messages from particular senders out of every affected users mailbox, typically 100-200/10,000. When I approached our Exchange admins about this idea I was met with ...
0
votes
0answers
54 views

Global Inbox Rules in Exchange 2013

There's a way to create global inbox rules in Exchange 2013? I'm not referring to the Transport Rules, because it does not perform what I would like to. It would be nice to force a Inbox Rule, ...
0
votes
0answers
234 views

How to send emails without ending up in Junk/Spam folder

I have installed a mail server in order to send e-mails using my own domain name. I've read many articles about how not to end up in Junk folder. I have done what those articles said: Added MX ...
2
votes
0answers
99 views

Restrict IMAP access for a given account to only one IP address in Exchange 2013

I've created a "spam crawler" account with full access to all mailboxes in an Exchange 2013 environment to get messages in the junk folder to feed the Bayesian filtering running on SpamAssassin in a ...
1
vote
0answers
75 views

Email spam/hack and odd apache logs around the same time

A friend of mine started getting failed delivery notices yesterday (June 23rd, 2014) on all of his domain e-mails, and so he asked me to look into it. I have been looking through various logs and his ...
2
votes
1answer
118 views

Single MailCleaner installation for two distinct domains with user authentication

I would like to use one MailCleaner installation to handle two distinct domains as one centralised spam management system, sharing configuration and mainly the bayesian filtering database. Both ...
7
votes
3answers
2k views

Should I let email bounce or send it to a blackhole?

I have a lot of unused (old, dead) accounts on my machine. Many of them receive literally thousands of emails a day, all spam. If the account was used by a person, I let the email bounce so that ...
2
votes
2answers
74 views

Sending mail from sub-domain on different server from domain getting flagged as spam

Our client owns a server with a domain: website.com We have a server that our client points videos.website.com to. Emails sent from videos.website.com are getting flagged as spam because website.com ...
0
votes
1answer
201 views

Plesk 12 Linux Server Mail Spam Issue [closed]

I'm running multiple websites on my dedicated server, and for one website in particular where users signup and then must verify their email address, I'm getting reports from my client that a small ...
2
votes
1answer
2k views

Postfix: Gmail marking my email as spam

I'm been trying to understand why Gmail is treating the email sent from one of my domain/server as SPAM. I found a lot of threads here about this issue, however I checked the usual suspects like ...
0
votes
1answer
1k views

Block Outgoing SMTP Except for Mail Server

Masters, Our ISP ask to solve a problem. They said we send many SPAM from our server. (they only give our router IP address, so we don"t know if we have SMTP flooders from infected cllient, our we ...
0
votes
0answers
55 views

How to check why SpamAssasin Bayes filter not working?

I have exim 4.77 with spamassasin 3.4.0 on Debian, I identify spams by myself and send to sa-learn, which seems working. But I have never receive spamscore by Bayes, I check the emails which ...
0
votes
1answer
73 views

Distinguishing spam from google servers

I run a very good anti-spam setup, except for one nagging little problem: Google. Some legitimate users use Google's mail service with custom mail domains. In other words, they do not use a ...