Tagged Questions
0
votes
0answers
91 views
Zentyal 3.0: Ubuntu 12.04 updated: gmail smtp sending spam
as of now I have stopped the zentyal mail service
I only have one user setup
as soon as I start it the service backup and run mailq from any system user it is full and keeps trying to send emails as ...
0
votes
1answer
38 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
49 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 ...
-2
votes
0answers
31 views
How to reject smtp fallback server [closed]
We have a fallback server for our webservers. So the webservers are whitelisted.
Now we have the problem that hacked websites on the webservers send spam trough the mail fallback server.
What we ...
1
vote
2answers
75 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 ...
1
vote
0answers
93 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 ...
0
votes
1answer
38 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
votes
0answers
18 views
Tracking email sending activity on the server [closed]
I administer Ubuntu server which is used by my clients for hosting various web projects. Recently i noticed that server is sending many emails and my provider notice me that he receive several abuse ...
1
vote
0answers
193 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 ...
3
votes
3answers
182 views
Send spam mail to a special folder using postfix
I have a postfix server running amavis and SpamAssassin to help filter spam. Messages that are detected as spam look like this when delivered into the user's Maildir:
From tom@tom-mint Fri Mar 15 ...
0
votes
2answers
126 views
Blocking spam on Ubuntu 12.04
We seem to be having a lot of spam emails in our mail.log file. For example
Mar 11 18:23:01 localhost postfix/qmgr[1452]: 87945226BD: removed
Mar 11 18:23:01 localhost postfix/smtp[8809]: 87945226BD: ...
0
votes
2answers
43 views
Emails from my server are delivered to spam
I have virtual server (Amazon EC2).
Emails from it (postfix) are sent into spam folders to some of the email services. And they are not sent to some emails (including some addresses on gmail).
There ...
0
votes
1answer
87 views
Error from Postfix server: mail for cacti.snowbarre.co.za loops back to myself
My setup is that my central mail server, CM forward to an anti-spam server, cacti which acts as an SMTP server. On of the email addresses on CM has been getting 40 emails generated apparently as a ...
0
votes
0answers
30 views
Can anyone tell from this email why this message gets flagged as spam? [duplicate]
My iRedMail server servers two domains. The older one sends mail fine. The newer one gets trapped as spam in gmail.
Delivered-To: spuy767@gmail.com
Received: by 10.58.206.18 with SMTP id ...
0
votes
1answer
50 views
Checking SPF for outgoing mails
Is there any particular reason why I should not perform SPF checks for outgoing mails?
I was reading on some articles that "you should not perform SPF checks for outgoing mails", why?
I'm doing SPF ...
0
votes
1answer
74 views
Possible spam emails from our server but not from our domains
I encountered something weird with my mail server. For about 3 days now I am noticing that my mail server sending emails that aren't included in my domains. There are from different IPs different mail ...
-2
votes
2answers
43 views
Second mail server for my domain [closed]
I have to setup a mail server because my hosting account don't allow me to send over 250 mail/hour.
I have a HP microserver at home and I want to use it to send the mails.
I configured Virtualmin on ...
0
votes
2answers
355 views
Configure postfix with a threshold for reject_rbl_client
I have my postfix main.cf configured with a number of blacklists:
smtpd_recipient_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_non_fqdn_sender,
...
1
vote
2answers
386 views
Removing an IP address from the Spamhaus blacklist
I am trying to remove an IP address from the Spamhaus PBL blacklist. I fill out the form with the correct information (IP address, email, etc.), but I get the following message when I try to remove ...
0
votes
2answers
101 views
Postfix Header Filter
I have set up a header filter in postfix to discard messages from Russia and Romania because of the volume of spam coming from those and we do not currently do business in those countries.
My regex ...
1
vote
1answer
133 views
Postfix block senders outside from local domains
I would like to block every mail that is coming in from a domain that is running on my server.
Example: I have domain1.com on my mail server and I'm getting a mail from outside with an email address ...
0
votes
1answer
168 views
Someone used my postfix smtp (port 25) to send spam mails to me
This week, someone started to send spam-mails through my postfix-smtp access (I verified by logging in through telnet from an arbitrary pc and sending mails with any ids myself) on my server, with ...
1
vote
2answers
274 views
Spam mail through SMTP and user spoofing [closed]
I have noticed that it's possible to telnet into a mailserver that I own and send spoofed messages to other clients. This only works for the domain that the mail server is regarding; I cannot do it ...
0
votes
1answer
174 views
Postini Alternatives? [closed]
I am looking at postini alternatives and was hoping to get some feedback from others. I'm looking for 50 to 100 users in a hosted solution. The catch is that I need to have API access and would like ...
1
vote
2answers
167 views
Preventing my postfix to send my local users spam
I have a postfix/dovecot mail server with 100 different users.
When they send an email they need to be authenticated.
I successfully use saslauth to achieve this.
Few days ago I had a problem. One ...
1
vote
1answer
221 views
E-mail address spoofing by spammers - how to block it in Postfix/Spamassassin?
I run a Postfix mail server using Spamassassin as after-queue filter.
It works quite well, but sometimes I get spam from the network that has correct MAIL FROM: address, but also contains, in DATA: ...
1
vote
1answer
237 views
Spammer relaying via Postfix mail server
I have a Plesk 9.5 mail server (cm.snowbarre.co.za) on Ubuntu 8.04 LTS which forwards all SMTP traffic to an anti-spam server cacti.snowbarre.co.za. Many times I see the headers on the anti-spam ...
0
votes
2answers
656 views
Receiving spam where sender is @mydomain [duplicate]
Possible Duplicate:
How to stop people from using my domain to send spam?
I am running a mail server with Ubuntu + Postfix + Maia Mailguard + Dovecot, all has been working well until ...
2
votes
1answer
285 views
Why Gmail mark as spam emails from my postfix server?
I'm trying to send email from postfix to different providers: Hotmail OK, Yahoo Not tested, Italian Provider OK, GMAIL KO !
I have SPF and rDNS set correctly ... this is the header:
Delivered-To: ...
-1
votes
1answer
130 views
spam keywords to block in mail
Can anybody suuggest me a list of keywords which i can block in mails which are sent from my postfix mail server.I wanna include them in my postfix header checks and body checks file.
0
votes
1answer
344 views
How to solve/disable spam sending with my postfix server on linux
I am quite new in setting up e-mail server on linux - I barely set up the whole think to get it working and connected it with my domain and php script which uses PHPMailer 5.2.1. In my setting I am ...
-1
votes
1answer
138 views
Postfix; Why did this email not get blocked?
Consider the following junk email received in which the recipient address is the same as the sender's address, but this users didn't send them self the email, it is junk mail;
(All hostnames and IPs ...
2
votes
2answers
96 views
removing spam between mail server and client
My postfix was badly configured and let a lot of spam emails through to an account. I've fixed postfix now so it's become a much better spam filter, and almost no new spam is getting through. However, ...
0
votes
0answers
695 views
Securing Postfix on Plesk
I woke up this morning to find my server's IP blacklisted by Gmail and Hotmail and 2,500+ 419 scam mails in my queue.
Server is Centos 6 running Plesk 10.4.4. I've googled for guides on securing ...
5
votes
3answers
2k views
PTR OK, SPF, DKIM passed but email messages are marked as Spam by Google?
# host 1.2.3.4
4.3.2.1.in-addr.arpa domain name pointer mail.domain.vn.
# dig +short txt domain.vn
"v=spf1 a mx ptr -all"
# dig +short txt mail.domain.vn
"v=spf1 a -all"
Here's an email header ...
1
vote
3answers
395 views
Postfix and Sendmail restriction for Spam
I have Postfix mail server. The mail server was spamming from an unexisting mail address so i used sender_restrictions in main.cf and sender_access (to discard mail from that mail address). Now the ...
1
vote
2answers
894 views
Emails forwarded via postfix get flagged as spam and forged in Gmail
I'm trying to setup a forwarding only email server. I'm running into the problem where all messages forwarded via postfix are getting put into gmail's spam folder and getting flagged as forged. I'm ...
-2
votes
1answer
548 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 ...
1
vote
2answers
166 views
Postfix - Block email from non-existent local addresses
My question is very similar to this one, but for postfix.
We keep getting emails from addresses like "accounting@example.com" delivered to our actual "@example.com" addresses. From my google ...
1
vote
1answer
434 views
Virtualmin with Postfix configuration is insecure
I'm still learning using linux, so please bear with me.
I have a setup on a debian server, with Virtualmin using Postfix for mail.
It's just a standard Virtualmin setup and everything has basically ...
0
votes
2answers
258 views
Postfix and myhostname/mydomain
I currently have Postfix running on a box that also hosts a number of websites. Although the website domains' DNS all have an A record pointing to this server, the server has no hostname of its own. ...
2
votes
1answer
158 views
Configure exim4 (or other MTA) to prevent sending duplicate emails
How can I configure exim4 (or another MTA) to avoid sending duplicate emails?
For my purposes a duplicate email can be defined as: same recipient and subject (or same recipient, subject and body)
I ...
1
vote
2answers
1k views
How can I filter spam from yahoo's servers?
In the last few months my mail server has been getting massive amounts of spam from yahoo.com's mail servers. Each one appears to be from a different Yahoo mail free account.
The spam is all coming ...
-2
votes
1answer
188 views
Black Listing in outbound relayed e-mail
We send outgoing e-mail with one server relaying e-mail through another server. When e-mail is getting black-listed, is it the originating server that is being blacklisted or the relay?
-2
votes
2answers
222 views
Postifx sends spam. Need to prevent [duplicate]
Possible Duplicate:
My server's been hacked EMERGENCY
I have a configured dovecot + postfix + mysql.
Few days ago i have received abuse from DC that i am sending spam.
And really in ...
1
vote
1answer
473 views
Gmail sends bulk messages sent by postfix to spam - spf, rDNS are set up (headers inside)
here are the headers of the blocked messages (actual domain replaced with domain.com, ip address with n.n.n.n and gmail account name with person.account):
Delivered-To: person.name@gmail.com
...
0
votes
1answer
1k views
Mailscanner and amavisd-new comparison
I'm going to implement a mailfiltering gateway for my company. I'm going to use Postfix, with a PostgreSQL back-end.
The question would be: how to best implement the antispam measures.
Mailscanner ...
0
votes
1answer
391 views
Webmin/ SpamAssassin doesn't appear to be 'learning' from forwarded examples of spam
I have spamtrap@ and hamtrap@ addresses set up on my mail server and forward examples of spam to the spamtrap address. I was hoping that after a few examples, SpamAssassin would 'learn' to identify ...
1
vote
2answers
351 views
Indepth Analysis: Prevent mail from being flagged as spam
I want to start an indepth discussion on all ways of avoiding mail being flagged as spam. I have done most of what i knew to prevent mail from being listed as spam. i have tried the following
1) ...
2
votes
2answers
3k views
Optimal parameters set for Postfix “smtpd_recipient_restrictions”
we've inherited the DNS from another ISP and now our mail server is bombed by about 1000 emails per minute, 99.99% of these emails are just spam. We're trying to optimize the filtering/rejecting the ...
