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Postings by Poliman - Serwis

spamming mailbox ?

I check the mail queue and the logs and this time I found some strange
thing. I used command "grep -r "emailemailemail.com" /var/log/mail.log" and
result is in attached .txt file. If I understand properly there is many
tries to send from <a href="mailto: ... at s1 dot poliman.net"> ... at s1 dot poliman.net</a> to
<a href="mailto: ... at emailemailemail dot com"> ... at emailemailemail dot com</a> but nothing happens
later because of failing connection to emailemailemail.com on port 25.

exclude specific external IP from postfix blacklists

I have a problem with specific IP 91.218.208.22. People from network behind
this address can't connect to mailserver, because - as I found out - this
ip address is listed. Not exactly this specific address but whole C class.
I saw Postfix uses blacklists in own configuration but I would like to
exclude only this one IP.

many le ssl certs assigned to postfix

I have server created based on Perfect Server tutorial for Ubuntu 16.04.
Is it possible to assign to postfix/dovecot as many lets encrypt ssl certs
as possible?

problem with sending emails from second IP

I have ovh public cloud server.

monitoring outgoing emails

Hi people. Do you know is there any tool/plugin for monitoring outgoing
emails from server with postfix? Maybe postfix has this feature?

report from google relate to failed dkim

I configured yesterday spf, dkim, dmarc for example.com. Today I got report
in xml on my mailbox. Attached. One from addresses has dkim failed - marked
in orange. What that means and how to fix it? I use ubuntu 16.04 lts and
postfix:

root@s1:~# postconf | grep version
disable_mime_output_conversion = no
mail_version = 3.1.0

unable to send email to hotmail.com domain

I have strange irritating problem. When I send emails from my server to any
email address to any domain they reach the target without any problem. But
when I try send to address in "hotmail.com" I got bounce:
< ... at hotmail dot com>: host
hotmail-com.olc.protection.outlook.com[104.47.40.33] said: 550 5.7.1
Unfortunately, messages from [ip_of_my_server] weren't sent. Please
contact
your Internet service provider since part of their network is on our
block
list (AS3140).

why postfix duplicate files

Hi, I have found in my /etc/postfix directory list of duplicated files. I
attach .txt file with this list. I don't do anything with postfix from few
months. If it's not normal please tell me how fix it.

disable receiving for particular email

Hi all. I would like to create "do not reply" email account. The simpliest
way is create an email account and disable receiving. Which option in
Postfix permit disable receiving for particular email?

change myhostname

Hi
I changed myhostname in /etc/postfix/main.cf from serwer-1.localdomain to
s1.mydomain.com but postconf -d shows something different from both
mentioned earlier -> s1.localdomain.
myorigin = /etc/mailname which includes -> serwer-1.localdomain
hostname -f returns s1.mydomain.com

Question is why after changed myhostname it still is different and why it
is different from value which I set and which were before setup.

problem with mails

I have mailbox on server configured with postfix.

something like smtp-limiter plugin for ISPConfig

Hi people,
I am looking for some plugin which is similar to smtp-limiter which is for
DirectAdmin. It would be nice if there would be any. If not, is there any
similar plugin which can be manage by the linux console?

confused with ssl settings and some error - need help

Hi,
To default dovecot.conf file I added (based on found documentation):
ssl = required
disable_plaintext_auth = yes #change default 'no' to 'yes'
ssl_prefer_server_ciphers = yes
ssl_options = no_compression
ssl_dh_parameters_length = 2048
ssl_cipher_list =
ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES2

error ssl stacked error routines

Hi
I have configured one line in postfix main.cf (after configure each line I
check /var/log/mail.err):
smtpd_tls_dh1024_param_file = /etc/postfix/dh2048.pem

After setup above line I have error in above log file (these 4 lines
looped):
Apr 25 14:08:09 serwer-1 dovecot: imap-login: Error: SSL: Stacked error:
error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol
Apr 25 14:08:09 serwer-1 dovecot: imap-login: Error: SSL: Stacked error:
error:1408A10B:SSL routines:ssl3_get_client_hello:wrong version number
Apr 25 14:08:51 serwer-1 dovecot: imap-login: Error: SSL: Stacked error:
error