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

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2
votes
1answer
95 views

How easy is it to sniff the SMTP port of webserver to capture mails

I've got a very basic question that I don't know the answer for. Our company owns a webserver that runs multiple websites and works as a mail server for these websites as well (e.g. to send contact ...
1
vote
1answer
679 views

hMail delivery queue full with unsuccesfull spam

Since a day or two the mail delivery queue of the hMailServer is exploding because someone is trying to send spam via this server. Though the e-mails aren't successfully sent it fills up the mail ...
0
votes
1answer
83 views

Mail server is seen under different IP by other mail servers, than it has --> mail marked as spam

I am experiencing problems with delivering emails from my server and can't see the real cause of this problem. Emails from my mail server are marked as spam. In message sourcecode I can see, that my ...
0
votes
2answers
85 views

Dealing with Apache spam

I am recieving a lot of suspicious requests which cause Apache to use a lot of memory (over 1GB) [Mon Feb 24 09:48:29 2014] [error] [client 120.37.238.125] PHP Fatal error: Allowed memory size of ...
2
votes
1answer
2k views

How to stop double-bounce FROM sender in postfix

I am getting huge amount of these in my mail log, and unable to find its originator. What could be the reason? Here is log entry: postfix/cleanup[9626]: 4413082E40: ...
0
votes
2answers
41 views

Marking emails with DKIM - safe?

Im running an email server as part of a research study. We have subjects connecting and sending email from a variety of clients. One function of this server is to communicate with said subjects - ...
0
votes
1answer
68 views

How do I get Ingo to provide sieve rules suitable for use with DSPAM?

Using the Ingo web gui which is part of horde, I can set up sieve rules that get written to file like so: # Junk-Review if header :comparator "i;ascii-casemap" :regex "X-DSPAM-confidence" ...
0
votes
1answer
43 views

Evaluation of mail server configuration

I have a mail server configured to use DNS real-time blacklists (DNSRBLs), e.g. zen.spamhaus.org, to determine whether delivered email is spam or not. I would like to evaluate my mail server's ...
0
votes
1answer
423 views

hMailServer forwarding and distribution lists with SPF checking

I have installed and configured hMailServer, primarily to allow me to create a distribution list for a private organisation, and some email address aliases. This is so that members of the ...
-1
votes
1answer
26 views

Can I check 'mailq' with vzctl from node?

Can I check 'mailq' with vzctl from node? I need to find out if VPS owner from one node sends SPAM messages. Any other way to check if VPS client sends SPAM ?
0
votes
2answers
96 views

opensource feedback loop implementation for email and webmail integration

I would like to find out if there is an opensource software that implements the Feedback Loop. I will try to be more specific. I want my clients to have the ability to report a message as spam and ...
1
vote
0answers
323 views

How do you view quarantined mailbox on Microsoft Exchange 2010?

When certain emails are quarantined for high spam scores, exchange sends a default email to the recipient stating that the email was quarantined for x reason. How do you view the quarantined emails? I ...
1
vote
3answers
4k views

Sendmail: Sender address rejected (Domain not found)

I'm running into problems with sending mail on our webserver. Some mails are sent and delivered without any problems (eg Gmail), while others are deferred with "Sender address rejected: Domain not ...
1
vote
2answers
495 views

How to remove all messages from exim mail queue from a certain user/email

I've spend the last hour trying to figure out how to delete all messages from a certain mail address from the exim mail queue, after the queue was full of spam emails.
3
votes
4answers
302 views

Spamming from my Linux server

Hi I was wondering if anyone could help. I got a email from my host company that there are some weird traffic coming from my server. A quick look into the log file revealed the sample log below. There ...
-4
votes
2answers
1k views

Our exchange server is sending out a lot of spam [closed]

We have an exchange server 2003 and our IP address was blacklisted. When I check the Queue folder in the exchange server root directory, there are tons of Delivery Status Notification (Delay/Failure) ...
0
votes
1answer
201 views

How can Sendmail reject email to a local user *unless* it comes from a trusted subnet?

I have sendmail set up to accept mail for a few domains and to relay messages for a few subnets' worth of systems. Recently a particular internal-use-only address has been receiving a lot of spam. ...
0
votes
1answer
300 views

What do I need to be able to send mass SMTP email efficiently? [closed]

I am creating a web application that allows users to send broadcast emails to a list of subscribers. Essentially, it's a mass emailer and autoresponder, like AWeber or Constant Contact or MailChimp. ...
1
vote
2answers
87 views

Listed on spamcop.bl.net - why?

I entered our mailserver IP and got this report: In the past 5.4 days, it has been listed 3 times for a total of 3.6 days How would I go about determining what caused my server to get flagged? Does ...
1
vote
1answer
598 views

Reject emails with many To/Cc recipients with exim ACL

I'm having a problem with emails with many (>20) To or Cc recipients being sent trough my mailserver. Worse these are mailing-lists so reach hunderds of people. People then reply-all causing ...
-1
votes
2answers
170 views

How to check if I can spam email with my VPS [closed]

Last time, I did have a problem with my VPS regarding being used as a spam mail server. Now I just did the backup and how can I test that I can use my server to spam or not ?
0
votes
1answer
199 views

Same email is evaluated as a spam for one user, and regular for the other

I have mail server, with installed spamassassin to filter spam messages. Problem I faced is that at 02h first user received email that is treated as a spam (and is was a real spam, moved to spam ...
10
votes
1answer
314 views

Microsoft is blocking mail from entire netblock. ISP doesn't know what to do?

I recently moved a client from basic T1 service to a multi-site MPLS solution with same vendor. The ISP, XO Communications, provided a decade of stable service as a T1 provider. The process of moving ...
0
votes
1answer
142 views

On Exchange Server enable require that all senders are authenticated on all groups

I have a large number of Distribution Groups on my Exchange 2007 server. I am starting to get spam addressed to these group addresses and would like to enable the "Require all senders are ...
0
votes
0answers
48 views

How do I set up autoreply for some accounts on an anti-spam gateway?

We have an anti-spam gateway set up which forwards mail to our exchange 2003 server. This works fine, but now I need to add out of office replies. I'm trying to do so with gnarwl, but so far don't ...
0
votes
1answer
310 views

tried to spam postfix, doesn't log IP address

I've had some serious spam issues with my local postfix installation, until I found out that there was a postfix user wich was allowed to relay mails (I still don't know why this was possible in the ...
2
votes
1answer
56 views

Simulating spam request?

I'm trying to test out some blacklist directives that I've just implemented., Is there a way to simulate spam requests?
2
votes
2answers
793 views

postfix sending mails to unknown addresses

I was checking my munin tables and saw a huge list of deferred mails in postfix and looking into /var/log/mail.log gave me an idea: I am sending mails to unknown mail addresses: Dec 23 08:21:32 ...
1
vote
1answer
116 views

How to solve gmail spam filter issue

We have a problem when sending emails to "gmail.com" domain. All of our emails end up in spam folder. We do not send spam or bulk emails, so I would like to know is there a way to solve this issue. ...
2
votes
1answer
277 views

I'm getting 500s while LIMIT / block http POST request w/ Apache(

I'm trying to use core - Apache HTTP Server's <LIMIT> Directive to limit spamers from doing POST's to my website(s): <Limit POST> Order deny,allow Include ...
2
votes
1answer
161 views

Prevent spam being forwarded by Postfix (while locally delivered to a Junk folder)

We have a pretty standard Postfix/Amavis setup where we use the Dovecot LDA to deliver mail locally. Amavis passed spam mail and we use Sieve to drop it in the Junk folder of the user. The problem is ...
0
votes
0answers
62 views

Spamassassin internal DNS resolution?

Short Version: Is it possible to configure spamassassin to perform its own recursive DNS lookups instead of using the server specified by the OS? Long Version: I've got a collection of dedicated ...
0
votes
1answer
131 views

Strange emails in maillog, can't understand meaning

So i've been fighting spam being sent from our server for the past week. We constantly get listed on CBL with rDNS setup and DKIM signatures. While monitoring the maillog i noticed the following: ...
0
votes
0answers
45 views

Information to keep in a spam black/whitelist

Assuming that I want to black/whitelist specific messages as spam/not spam, what message/sender info should I collect in that blocklist? The address will be most likely faked so I assume the 2 ...
-3
votes
1answer
148 views

Google-style “Your network is generating too much traffic” bounce for postfix

I'm being attacked from a botnet and I found out about it because I got this email from mailer-daemon telling me there's no space left on device. The mail.log was filled up with messages like Dec 5 ...
0
votes
1answer
187 views

View all spam for domain in mailcleaner

I have the community edition of MailCleaner. Is it possible to view all messages that were marked as spam from the admin website or cli? I see the /admin/managespamquarantine and ...
1
vote
1answer
145 views

Whose DKIM signature to use, my own or Amazon SES'?

I have OpenDKIM properly set up to sign emails from my domain such that when sent through Amazon SES, Yahoo Mail shows dkim=pass. Given I got the infrastructure working, is there any benefit to ...
-2
votes
1answer
98 views

On my Amazon EC2 instance for a school project. I tracked visitor IPs and within 5 minutes an IP linked to cnn-noc.net (Huawei/China Netcom) appeared [closed]

I'm not sure if there are any rules here regarding posting specific IP addresses so I will take the address down if necessary. As aforementioned, I put up an IP tracker on my Amazon EC2 instance for ...
0
votes
3answers
229 views

postfix sending newsletters as spam to the receivers [duplicate]

I have some problems with my postfix setup. We send newsletter regulaly to our customers once or twice a week. and we have expierenced that many customers do not get their emails, it's simply because ...
4
votes
1answer
198 views

Silently drop OUTGOING mails to us.er.n.a.me@gmail.com (more than 3 dots in username part)

With postfix-2.6.6-2.2.el6_1.x86_64 on CentOS 6.4 is there please a way to inspect OUTGOING mails and silently drop them (i.e. do not send them) if the recipient looks like us.er.n.a.me@gmail.com ...
0
votes
1answer
108 views

Disable open-relay in exchange 2003 behind NAT

I have an exchange 2003 which is authoritative for my only one domain. It's in my DMZ and NAT'ed. I am an open relay, sending thousands of spams. I want to stop it but I still want to receive email ...
0
votes
1answer
216 views

Exchange 2007: User/Computer Sending SPAM

This question is an extension in some ways of this one: Exchange 2007 server send out spam We're running Exchange 2007. We have an end user who received an Exchange bounce back (generating server is ...
1
vote
1answer
110 views

Assistance on why email is being marked as spam [duplicate]

We are trying to send out a mass email for a client of ours through a third party sender and it is always being sent to the spam folder rather than the inbox. I have below the headers from the email. ...
0
votes
1answer
244 views

Postfix: mail going to spam [duplicate]

All emails I send from my new server go to spam in Gmail (and sometimes yahoo). I've never before sent out mass email or spam. What I've already done: Configured reverse DNS Enabled DKIM Verified ...
0
votes
2answers
88 views

Which steps are required to avoid my server being considered as spam sender?

I'm looking to set up a webmail server that will be used by a lots of users that will receive and send emails. They will also have the possibility to forward emails they receive. I'd like to know ...
-1
votes
1answer
125 views

Mountain Lion Server reject spam

On Snow Leopard and Lion server there was a filter option to reject (bounce) unwanted spam. With Mountain Lion Server the filtering still works, but it only gets flagged as spam with *** JUNK MAIL ...
6
votes
4answers
2k views

Why does my mail get marked as spam?

I Have the server "afspraakmanager.be". It matches everything not to be a spam server.(it isn't by the way): it has reverse dns, spf,dkim,... . But hotmail marks it as spam. I think the problem is ...
0
votes
1answer
298 views

Prevent server beeing flooded with requests

I'm hosting a Wordpress-blog on an Apache server (shared hosting). For some reasons I've been receiving like 100 requests per second to xmlrpc.php for a few days. The access.log looks like this: ... ...
0
votes
1answer
50 views

How to block mails from a server in gmail

I am getting mails daily from different mail address like ry8029@fastmail.fm ry1532@outlook.com etc. Since , the mail Id is changing daily , I can't filter those mails. I checked that ...
0
votes
1answer
469 views

SPF + ISP Smarthost, always untrusted?

One of the ways mail-servers protect themselves from spam is by SPF-records, a DNS look-up saying what ip-adresses are allowed to send mail from a given domain name. Another way the mail-servers use ...