-1
votes
2answers
73 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 ...
-1
votes
0answers
27 views

How to send email from home ip when the email server isn't a designated outbound mail server allocated to BT Retail customers [on hold]

I can receive email, but when I try to send an email from my home office via our work email server (which I am admin of) I get the following reply: Your message did not reach some or all of the ...
-2
votes
0answers
36 views

My smtp server is spammed? [duplicate]

I have a server and the postfix client on it. Since several days, I noticed a lot of processes running there. When checked, there are a lot of emails sent. Here is an example from the mail log: Aug ...
0
votes
1answer
51 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 ...
-1
votes
2answers
130 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 ...
0
votes
1answer
50 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: ...
1
vote
1answer
48 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 ...
0
votes
0answers
47 views

determine which application is sending mail via postfix

I would like to track down which applications (other than PHP, which I can track via mail.log setting in php.ini) are connecting to and sending email via postfix. Is this possible via any log ...
1
vote
1answer
94 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
37 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 ...
-2
votes
1answer
68 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 ...
1
vote
1answer
138 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 ...
1
vote
2answers
180 views

Postfix sends email to spam (gmail, hotmail)

I recently installed a postfix + dovecot + dkim multi domain, multi user, multi alias mail server on my debian squeeze system. Everything works except for one big issue that basically makes the whole ...
0
votes
0answers
47 views

send outbound postfix email to other server

I have more than 18 mail servers, running postfix. All of them have around 10,000 customers with more than 25,000 email addresses. as we didnt applied password policy before (and cannot apply it now ...
0
votes
0answers
34 views

Server is sending SPAM but it's not an open relay [duplicate]

I have a problem with Dovecot + Postfix. My server is sending SPAM from the local user "dovecot", but my server is not configured as an open relay (mails can be sent without auth-ing only from ...
0
votes
0answers
46 views

Spam mails from vulnerable wordpress contact form

Recently I receive an e-mail from my server's host about spam mail coming out from my server's ip. I tracked down the problem to a specific site that is hosted on my server, it is a wordpress site and ...
-2
votes
1answer
901 views

Mail delivery failed for a message I didn't send [duplicate]

I have started to receive emails with the subject: "Mail delivery failed: returning message to sender" for emails I haven't sent. I host my own mail server at my domain matos-sorge.com (a linode) and ...
-1
votes
1answer
83 views

Postfix user is not allowed to submit mail

I am running a webserver on debian wheezy with postfix and about 3 months ago I had a major spam problem with one my domains with web21 id. I made a fresh wordpress install and everything and the ...
0
votes
2answers
46 views

Efficient way to get Postfix talk to SpamAssassin

Traditional methods of doing this on SA wiki talk about shell scripts as content filters. Well that's an additional fork syscall on every email and the volume that will flow through the machine is ...
0
votes
1answer
29 views

Using DKIM in my server for multiple domains (websites)

As I couldn't find this exact tutorial in Stack, I share my findings with al of you. I always get things solved thanks to this comunity. Thanks! Original question: I've read the tutorial posted by ...
-1
votes
2answers
212 views

Postfix is Sending Spam [duplicate]

I have an Ubuntu 12.04 server, hosted on AWS, that powers a dozen WordPress installations using Nginx and php5-fpm. The problem just began one day. My server was down. Panic! Whenever I turned it on ...
1
vote
1answer
70 views

what user is sending emails from mailq

I have a debian box with postfix on it. I checked the mailq and I do not understand how to read the mailq. I need to know witch user is used to send this emails. here is a example 0F87797868C ...
0
votes
0answers
27 views

Spam - openrelays using our email addresses

Folks, I'm getting into trouble with spam filters on the internet. Our own email addresses are being used by spammers and replies are being sent back to us with notification about addition to ...
2
votes
1answer
309 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
32 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
0answers
109 views

Amavis log clean passed mails to mail.log

I use amavis on my Ubuntu host to scan emails for spam. Unfortunately amavis log all clean passed mails to the 'mail.err' and the 'mail.log'. How to prevent the 'mail.err' logging? mail.err example ...
1
vote
2answers
81 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 ...
0
votes
1answer
167 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 ...
0
votes
0answers
72 views

Information about the “dot attack” to email servers

I have an email server working for about 1 year. I usually look logs to see what crackers try and find possible security issues. I have received several times a strange attack that I do not ...
2
votes
2answers
378 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
0answers
80 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 ...
-3
votes
1answer
103 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
3answers
157 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
115 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
168 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 ...
6
votes
4answers
1k 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 ...
1
vote
0answers
89 views

Configure postfix to limit total number of connections from any and all SMTP clients in a given time period?

I am trying to figure how to configure Postfix to operate within the requirements given by Spamhaus for free usage of their DNSBLs (http://www.spamhaus.org/organization/dnsblusage/). They specify that ...
0
votes
1answer
102 views

Can't deliver emails to microsoft

I have a postfix server, on Ubuntu 13.04. On my domain, I set up correctly every MX, SFP, DKIM and A record. I've tested them with gmail, reports DKIM and SPF PASSED. So no problems, my mails comes ...
-1
votes
1answer
313 views

Spam Filters - Why does the same message fail via one smtp server but not the other?

I have a PHPMailer script sending email. If sent via postfix localhost it is marked as spam with these headers. Delivered-To: xxxx Received: by 10.58.210.166 with SMTP id mv6csp82473vec; Sun, ...
0
votes
2answers
98 views

Postfix spam flood from my network

I have some issues with my postfix server. Recently it started sending spams, but only in my local network, since open relay has been closed, only allow to my network. I've tried a lot of solutions ...
0
votes
1answer
380 views

How to Isolate source of spam on Centos 6.3 Plesk 11 server

Been spammed and the header is showing: X-No-Relay not in my network X-No-Relay not in my network X-No-Relay not in my network X-No-Relay not in my network X-No-Relay not in my network Received ...
0
votes
0answers
169 views

DKIM SPF passes but mail goes to Spam Received: (from abc@localhost)

I am facing an issue with the DKIM setup. We are sending newsletters which are going to spam in gmail. The dkim & spf passes. Even the reverse dns is setup properly. Below is a copy of mail ...
0
votes
1answer
246 views

In Heroku's add-on of Sendgrid, how come I don't have to enter TXT fieldn in my DNS records?

When I used Amazon SES, I had to put TXT records in my DNS so that Yahoo/Gmail knows that the server is allowed to send from my domain name. However, when I signed up for Heroku and Sendgrid Add-on ...
0
votes
2answers
83 views

Do email spam detection block domains?

Does email (like gmail, yahoo, hotmail) providers block domains? Or do they mainly block IP addresses? I'm wondering...what if people use my domain to spam others? Then it would be unfair to me ...
0
votes
1answer
124 views

Dovecot Forward Spam

I was wondering if anyone had any knowledge on how this idea can be done. It's not a requirement but more of an idea I came up with that I don't know how to word my google searches to find out if it's ...
0
votes
2answers
370 views

SPF, DKIM, PTR & friends Passed, but postfix mail goes into spam How to Fix it? [duplicate]

I recently setup an email server with static IP address, (Ubuntu 12.04 & Postfix); Everyting looks OK, I did te test@allaboutspam.com test and everything passes in green (except for BATV format ...
1
vote
2answers
462 views

Configuring Postfix, Spamassassin and Procmail to put spam in a dedicated folder

I'm not sure if SF is the good place for that, so sorry if it's not the case. I'm administrating a Debian server for our company's emails and I'm trying to have the emails flagged as spam by ...
2
votes
0answers
431 views

Postfix server begins send spam immediately after starting

I've installed a postfix server on a debian os & also I've installed apache 2.0 with php on same machine Several days ago my server begun to send a lot of spam messages via postfix. I understood ...
1
vote
2answers
619 views

How to detect and prevent postfix from dishing out spam email from compromised mail account

We host email and websites for numerous customers on a dedicated server running CentOS and configured through Virtualmin. Email is handled through Postfix. Over the weekend we noticed that a clients ...
1
vote
0answers
327 views

php mail + postfix with multiple domains send from right domain?

i followed this tutorial to set up Postfix+Dovecot+postfixadmin on Ubuntu: http://www.exratione.com/2012/05/a-mailserver-on-ubuntu-1204-postfix-dovecot-mysql/ I want to send emails from multiple ...