Sign emails with OpenDkim + Postfix + Ubuntu 10.04 64x. How-to implement a domain key signature using Postfix Ubuntu based email server. Implementing a domain key will help your outgoing email not being marked as SPAM by the receiving servers that implement DKIM signatures verification., i.e. Yahoo, Gmail, etc.
View 9 RepliesI just installed opendkim but I have no idea how to set it up.
View 2 Replies View RelatedI have a static IP from local ISP and my computer is configured with 192.168.1.2 (LAN IP).
I have installed ubuntu server 9.04 and want to send emails from my server for which I've configured postfix. But I dont know what to do next.
My questions are:
1. Do i need to install DNS server for using postfix? If not, what should I install to send emails from this server?
2. Do I need to forward any particular port in my router?
3. If I dont have a fully qualified domain, what are the configurations I need to do to send emails?
We have a number of servers at work, some production and some non-production. We run some java applications on these servers. At present these java applications send emails via an SMTP connection to our live email servers.
In production all is well, the java apps send emails to customers. However, in the non-production environments all emails must not be sent out. Instead they must end up in some kind of generic inbox.
We don't want to mess with the production setup at all and it isn't an option to lose the non-prod emails altogether. So on non-prod we can reference another SMTP server and send all emails there. So far I've set up a postfix, dovecot, squirrelmail email server which appears to work.
how do I config my new email server so that any emails sent from our non-prod server to fred@hotmail.com, bill@yahoo.com, jenny@gmail.com etc all end up in one inbox?
I've been banging my head against the screen on this strange problem. Somehow my server sends out spam mails to a lot of aol mail addressess. The mail.log file looks like:
Code:
Dec 2 16:10:55 Ubuntu-904-jaunty-64-minimal postfix/qmgr[7685]: E95C2B48DB4: from=<HappyShopping@somedomain.nl>, size=1912, nrcpt=1 (queue active)
Dec 2 16:10:55 Ubuntu-904-jaunty-64-minimal postfix/qmgr[7685]: 5D4E0B48DB5: from=<HappyShopping@somedomain.nl>, size=1904, nrcpt=1 (queue active)
Dec 2 16:10:55 Ubuntu-904-jaunty-64-minimal postfix/qmgr[7685]: 8F540B48D04: from=<NewYearSale@somedomain.nl>, size=1894, nrcpt=1 (queue active)
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I've been looking for a way to filter out emails on my postfix server by GeoIP data. I couldn't find anything that fitted the bill so wrote my own in Python as a postfix policy. Thought I'd post it here to see if it's of any use to anyone else. I've attached a tar of the files as the Python formatting will get mucked up by the forum code. Comments/improvements are welcome (be kind ) First file is : policyd-geoip which is owned by root:root and placed in /usr/bin with 755 perms
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I have a problem with my VPS not being able to send any emails to Yahoo! addresses. Each time someone with a mail account tries to send something to a Yahoo! address, the email stays stuck in the mail queue and a 'delayed mail (still trying)' message is sent back to the user. I understand that Yahoo! has a tendency to block mail servers on a whim, but what I'd like to know is, how can I prevent Postfix from specifically retrying to send emails to Yahoo! mail servers? I don't want to stop retries to other mail servers.
View 1 Replies View RelatedI tried searching the posts and have come up empty handed. I need to find an email I sent to myself (actually a forward of several other emails) that did not get delivered. Otherwise I need the original emails themselves. I have been using pop with dovecot on my ubuntu server Jaunty machine. I searched the mail logs and found that the reason the message might not have been delivered could be because my permissions were not set to administrator for that user. I changed the permissions and still nothing came back.
I deleted the client mail account on the machine I used that had the messages but I was hoping they might still be somewhere on the server. Any ideas?
I get the following message when I try to send an e-mail with the option "PGP Sign" in Evolution:
Code: Select allCould not create message.
Because "gpg: skipped "67449612": No secret key gpg: signing failed: No secret key", you may need to select different mail options.
I have "Preferences > Mail Accounts > Edit > Security > OpenPGP key ID " set as 67449612, which is my subkey for signing, and this configuration has worked properly until two days ago when I upgraded a bunch of packages with evolution and gnupg among them. Since I am not sure this is really a bug or what package would it belongs to I am asking here first before submitting any bug.
I believe signing works and the secret subkey is "find-able" because I am actually able to do the following without any errors, and this is why I don't understand the error given by Evolution:
Code: Select all$ gpg --output random.sig --detach-sig random.txt
You need a passphrase to unlock the secret key for
user: "Rock Storm <rockstorm@gmx.com>"
4096-bit RSA key, ID 67449612, created 2016-02-21 (main key ID C96832FD)
$ gpg --verify random.sig random.txt
gpg: Signature made Sun 28 Feb 2016 11:47:47 AM CET using RSA key ID 67449612
gpg: Good signature from "Rock Storm <rockstorm@gmx.com>"
My gpg's keys configuration, notice that the "defaut-key" option in gpg.conf is commented out. This configuration worked for sending signed e-mails at least once before the upgrade.
Code: Select all$ gpg --list-keys rock
pub 4096R/C96832FD 2015-12-13
uid Rock Storm <rockstorm@gmx.com>
sub 4096R/7C2F5752 2015-12-13 [expires: 2018-03-12]
sub 4096R/67449612 2016-02-21 [expires: 2018-03-12]
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From the bunch of packages upgraded the ones I believe to be related to Evolution were the following:
Code: Select allgnupg:amd64 (1.4.20-3, 1.4.20-4)
evolution-data-server-common:amd64 (3.18.3-1, 3.18.5-1)
evolution-common:amd64 (3.18.3-1, 3.18.5-1)
evolution-data-server:amd64 (3.18.3-1, 3.18.5-1)
evolution-plugins:amd64 (3.18.3-1, 3.18.5-1)
libevolution:amd64 (3.18.3-1, 3.18.5-1)
evolution:amd64 (3.18.3-1, 3.18.5-1)
I searched current known bugs in Evolution and I could not find anyone related to this.
I tried downgrading it to the previous version but I wasn't able to downgrade every package related to Evolution. Curiously the previous version for some of them seems no longer available:
Code: Select all# apt-get -qq update
# apt-get -s install evolution-data-server=3.18.3-1
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Version '3.18.3-1' for 'evolution-data-server' was not found
# apt-cache show evolution-data-server | grep -i version
Version: 3.18.5-1
Version: 3.12.9~git20141128.5242b0-2+deb8u2
Anyway, downgrading only the following four packages did not resolve the issue, and I am still getting the same message in Evolution:
Code: Select allDowngrade: evolution-common:amd64 (3.18.5-1, 3.18.3-1), evolution-plugins:amd64 (3.18.5-1, 3.18.3-1), evolution:amd64 (3.18.5-1, 3.18.3-1) libevolution:amd64 (3.18.5-1, 3.18.3-1)
Current package's state:
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I work for a university institute and administrate its servers "incidently". Currently I am putting some work into our mail server configuration (sendmail 8.13.1 with amavisd-new-2.6.4). Recently I got amavis to verify DKIM signed mails. Now my plan was to sign outgoing Emails ourselves. This is what I have done (I replaced some names for privacy reasons):
I created a private key:
Code:
/usr/local/amavisd/amavisd genrsa /var/dkim/SEL1_DKIMkey.pem
Changed permissions for the user running amavis:
Code:
chown -R vscan.vscan /var/dkim/ && chmod -R 700 /var/dkim
Editet my /etc/amavisd.conf:
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Send Testmails to sa-test@sendmail.net and check-auth@verifier.port25.com . They automatically create answer mails considering signature information.
Send emails to my external account at some other provider.
The problem is that amavis is not signing the mails. Both automatic test emails reported, that the mail had not been signed. The mail to my external account also did not contain any DKIM information.
"My" system:
Code:
# uname -r & cat /etc/issue
2.6.9-89.0.11.ELsmp
Red Hat Enterprise Linux AS release 4 (Nahant Update 8)
I configured dk-milter on a server and created dns records for that, But I'm not getting sendmail to sign emails. dk-milter configuration is correct but the problem with sendmail.
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I recently decided to switch back to a stand alone email client from gmail. I started with thunderbird, which had a very intuitive user interface and was working fairly well, except for the fact that when it wasn't supposed to be doing anything, it was taking up about 40% of my CPU (this is after it had downloaded all the emails, so there really wasn't anything that needed that much cpu usage from my perspective). After investigating that a bit, I decided I'm going to go for something lighter, and now I'm trying to claws-mail. This one is fast and quick, with very little bells and whistle, and I think it has the potential of keeping me happy.
However, there are few things that I can't figure out how to do. The two main ones right now are: How do I make it download all the emails in at least the inbox folder? I'm using imap protocol with gmail, and I'm happy that the two mailboxes are very well synced, however the only thing it is downloaded by default is the email header, and not the content. I would like to be able to download the content immediately, so I can read the email offline as well. How can I set up GPG to sign my emails automatically? In claws-mail to sign my emails, I need to go to the Options->Privacy Options->PGP Mime, followed by Options->Sign. Is it possible to make this the default option?
setting up dkim with opendkim. take a look at my db files below, and config file for opendkim to see that I'm getting this right? When I try and send an email to [URL]... I get back 'perm Error', domainkey not found. Have I made a mistake? My domain is [URL]... and I'm running ubuntu 10.04.1 64x.
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Here is what i do: make clean make makefiles CCARGS='-DEF_CONFIG_DIR="/opt/product/postfix-2.6.5/etc"
-DEF_COMMAND_DIR="/opt/product/postfix-2.6.5"
-DEF_DAEMON_DIR="/opt/product/postfix-2.6.5/libexec"
-DEF_MAILQ_PATH="/opt/product/postfix-2.6.5/bin/mailq"
-DEF_DATA_DIR="/opt/product/postfix-2.6.5/lib"
-DEF_NEWALIAS_DIR="/opt/product/postfix-2.6.5/bin/newaliases"
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make install then i got this error: postfix: fatal: chdir(/usr/libexec/postfix): No such file or directory make: *** [install] Error 1 I don't understand why it's checking the usr/libexec folder for the daemons although I've set the folder to /opt/product/postfix-2.6.5/libexec in the makefile. Here is also the cat of my makedefs.out:
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i'm not a techie but have tried my best to solve the issue without success. I have a static IP from local ISP and my computer is configured with 192.168.1.2 (LAN IP).
I have installed ubuntu server 9.04 and want to send emails from my server for which I've configured postfix. But I dont know what to do next.
My questions are:
1. Do i need to install DNS server for using postfix? If not, what should I install to send emails from this server?
2. Do I need to forward any particular port in my router?
3. If I dont have a fully qualified domain, what are the configurations I need to do to send emails?
I've installed Postfix MTA in Xubuntu. Where are all the emails stored in my Postfix server?
View 2 Replies View RelatedI am trying to find a way to tell postfix to forward all emails from
dbsupport@thisdomain.com
and
helpdesk@thisdomain.com
to
be sent to admins@thatdomain.com, but it is not working. I am trying transport maps. The content of my transport file is:
Quote:
helpdesk@thisdomain.com smtp:admins@thatdomain.com
Quote:
dbsupport@thisdomain.com smtp:admins@thatdomain.com
Both [URL] and [URL] are on box1 as an alias in the /etc/alias file like this:
root: helpdesk@thisdomain.com
root: dbsupport@thisdomain.com
how to get this working?
I have lenny with postfix, countier-imap, squirrelmail installed i can send emails but i can not receive any emails.
View 6 Replies View RelatedI'm stuck with postfix. It cannot send emails and I cannot find out why! smtpPort 25/tcp is open. I can telnet localhost with 25, but not the localhosts IP(192.168.1.15). Sendmail is OFF. Here is the main.cf file!
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
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I am using the Postfix SMTP server for sending emails. However I just did a default installation and subsequently someone is sending spam using my SMTP server. I would like some help on securing my Postfix server and to block these mischievous emails being sent from my server.
View 2 Replies View RelatedRunning Postfix 2.6.1 on Slackware 13.0.I noticed that if I send an email with a large attachment(namely more than 500 KB) from another computer using this postfix server as an smtp server, it takes up to an hour to send it.It's almost like postfix is configured to send large emails later with a lower priority.The client computer and postfix server are within a GIGABIT LAN so upload 500 KB isn't an issue.
View 1 Replies View RelatedI have configured Postfix on a Ubuntu 8.04 box using this tutorial:I can send emails but I cannot receive any email because of a "bad recipient address syntax:"The log from /var/log/mail.info says this:
Code:
Apr 25 14:46:06 360romania postfix/pickup[31716]: 74A682190661: uid=0 from=<root>
Apr 25 14:46:06 360romania postfix/cleanup[32402]: 74A682190661: message-
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Is there any way can read content of email in queue? Or emails sent in few last seconds?
View 1 Replies View RelatedI have a CentOS 5.3 system running a recently installed Postfix (I removed sendmail so I positively know it's running Postfix).
I am able to send out email as user root, but when I change to another user on the same server, the mail delivery fails.
Here's what's captured in the /var/log/maillog:
Here's my main.cf
No changes to other Postfix files since install, so they are the default files.
I have a web application installed on a Debian server that sends out a lot of e-mails. Is there a way to configure Postfix to retain the messages in a queue and send all of them at midnight for example
View 2 Replies View RelatedI have nagios and postfix on the same ubuntu box.Postfix is able to send emails out as root and my user id to my gmail acct, but not as user nagios, which does own the nagios process. I haven't been able to find a way to authorize user nagios to send email (really), but I don't know if this is the underlying issue. Frankly I don't care what acct they originate from as long as they arrive.Currently, all notification emails are being dumped locally into root's mailbox. There are no errors in either the nagios.log or the mail.log.I've added my gmail address to the contacts.cfg, replaced it in the nagios.cfg, and put it every other place I could find root's mailbox mentioned. I've also created an alias for root to my gmail acct with no luck (didn't want to do that fearing I'd receive emails for other system events, but it didn't work anyway)
View 3 Replies View RelatedI'm experimenting with with mail-servers now and I'm trying to configure postfix to send emails from one email(pop3 is gmail) to any email outside the local network. Server is Ubuntu 10.10 with the last updates.
View 1 Replies View RelatedI have recently installrf MailScanner on my CentOS 5.5 and followed this instruction [URL] However, my postfix doesn't seems to be working after the installation. All the emails sent (using squirrel) mails are being held at /var/spool/postfix/hold
View 1 Replies View RelatedOne of our postfix servers is for sending/receiving internal emails only. When a user entered a wrong recipient address, it will take almost an hour for the user to get the "Recipient address rejected" email. What can be done to let the user get the "Recipient address rejected" email quickier.
View 7 Replies View RelatedI'm building a replacement postfix email server and I'm getting intermittant loss of sent emails; where: sometimes mail ends up at the recipient (a hotmail address) and sometimes not. Having an offsite relay (or posting directly to the internet) doesnt help either. (Although using hotmail itself as a relay always works despite logged complaints about unchecked ssl certs) Most dissapointingly the log files for the smtp transations are the same for successfully received emails as for the "lost" emails.
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