Ubuntu Security :: Inserting Fake Mail Via Disconnect IMAP?
Apr 1, 2011
After a April Fools' Day joke with fake mails (simply faked by forwarding & changing the text body) I tried to insert "real" fake mail into my online GoogleMail account. It was incredibly simple and that freaks me out a little.
I simply created the mail in Kontact, moved it to the folder I wanted it to appear in and synced - done. Someone with better knowledge might probably even manipulate the Kontact database on my computer and then sync, even changing old mails from years ago.
Is there a way to prevent this or find out that the mail wasn't really e.g. sent but just faked? I'm working at the university as a teaching assistant at the moment and from time to time you have those "No, I didn't miss the deadline, I send the mail with the paper to you" students. It was never necessary until now, but I always thought that I might check that by simply asking the student to show me his or her "Sent" folder in their online mail account. But that won't work if you can insert mails into your "Sent" folder via disconnected IMAP.
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Nov 19, 2010
I'm running SUSE linux Server version 11. I want to configure mail server with postfix & cyrus-imap. For that, i have read many documents in Internet by i met issues. I'm running DNS in this server & it's ok Now I cannont send mail through command line.
[Code]....
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Mar 22, 2016
The problem I have is so simple yet difficult for me to resolve. My Postfix MTA allow fake mails from me@example.com to me@example.com. How can I block them?
For example, if I do "telnet smtp.mail.yahoo.it 25", as I write the MAIL FROM command I get the alert "Authentication required". How can I achieve that?
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Jun 17, 2010
I am traveling outside US and trying to watch netflix from my computer.
However, it is blocked in my region. Is there a way to fake the IP address to looks like i am viewing the content from the US?
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Feb 24, 2010
I have 5 mailboxes provided by my ISP, which I have been using since 2005 with IMAP.1 month ago my Thunderbird client under both 9.04 (desktop) and 9.10 (laptop) started refusing to delete any incoming mail in one of my mailboxes (but not in the other 4).
Error message: "(...) Mail server responded: System I/O Error" 1 week ago, same problem for another mailbox (but not for the other 3), again affecting both machines. Evolution does delete incoming mail on these 2 mailboxes, no issues at all. Have googled, found only one solution (imap folder corrupt), but nothing makes sense.
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Jan 9, 2010
I'm on a fresh Ubuntu 9.10 x86_64 install and I'm trying to configure Evolution to grab my email from Gmail using IMAP.
For receiving mail my server is set to imap.gmail.com:993 and my user name is ___@gmail.com
I'm using SSL and the authentication type is "Password"
If I click the "Check for supported types button, the "Please wait. Querying server for a list of supported authentication mechanisms." window pops up, but it never finishes.
When I try to sync my mail, evolution doesn't ask for my password, and the send and receive mail window displays my account as "Scanning folders in "IMAP server imap.gmail.com" indefinitely.
Running Evolution from the terminal doesn't seem to print any IMAP related errors only
Code:
** (evolution:5565): CRITICAL **: atk_object_set_name: assertion `name != NULL' failed
POP works fine, but that isn't really an option.
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Sep 3, 2010
I've set up an postfix+courier imap+mysql server.is it possible to 'move' mailfiles over to the imap store? I have another mail address at my isp provider. And I would like to get rid of my pop mail storing mails locally in my mail client (which is windows; ms outlook). My ISP doesn't support imap, and I would like to store all my mail on one server, which is located in a good server envirmonment. Plus it's nice to have access to all mail from a web interface when it's vacation/travel time. I was thinking something like having a pop client cheking for mail every couple of minutes on the server, some suedo code follows:
Crontab on local server:
0,5,10,15,20..55 * * * * /usr/sbin/checkmail
2,7,12,17,22..57 * * * * /usr/sbin/mv_mail
checkmail:
Checks and downloads popmail from external server
mv_mail:
moves mail from e.x /var/spool/mail/pop/user/cur/* to /var/spool/mail/imap/user/cur/*
Will this kind of setup be possible? is Maildir style popmail compatible with Maildir style imap?
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Apr 28, 2009
I have recently set up a mail server running dovecot and everything is fine. However, I now want to retrieve the contents of 2 pop mail boxes and insert them into the IMAP structure under dovecot. I need to check for spam and sort them according to sender and recipient.
What is my best software option for retrieving the mail?
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May 24, 2010
I am having some trouble finding the information i need, here is what i am trying to accomplish.
1. Download POP email messages from cody@clearsky.net.au using fetchmail and assigning them to account "cody"
2. Connect and view the emails via IMAP using dovecot server logging in using "cody"
So far i have the fetchmail part working fine, but i cannot see any emails in the inbox. The messages are going thru however as they are visable in MUTT. i have edited my /etc/dovecot/dovecot.conf to change the mail directories, but no luck
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Jun 11, 2011
I frequently receive e-mail from mailing lists in which I would like to stay active in, although when I access my e-mail I'd like to be able to have the unimportant e-mails in their specific IMAP-folders so I can read them later when I have time.
There is one very important requirement. It bugs me that people continuously keep advising me poor solutions that involve forwarding e-mail e.g. to blabla-mailinglist@domein.tld or storing the e-mail locally. I work frequently from different locations, use different e-mail accounts and see e-mail stored on the server rather than on my local machine as a great advantage.c.
I was thinking of preferably a simple solution that works via a cronjob to do sorting, so it will also work for Plesk and Gmail IMAP accounts. Sorting based on from/to/subject should be sufficient.
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Feb 23, 2010
Setup my postfix mail server and courier-imap/pop. My postfix server now is working with tls and saslauthd, I can send/receive email inside my domain as well as outside. However, I need two separate smtp and imap/pop3 server, I mean two machine - one with smtp function and one with imap/pop3 function working together.
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Dec 22, 2010
I setup a postfix mail server. Tested it to make sure it was secure and all seemed good.I sent some test messages and see from the logs that mail is being delivered to the recipient. its only delivering mail to my user's local mbox on the linux server. IMAP appears to have its own mailbox and the two boxes are no linked. I was thinking it was an alias issue however I did at one point have the mailboxes to be the same.... now they are different... Here is the config file.... (I changed the domain names for privacy).
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
[code]....
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Mar 18, 2010
I'm running Dovecot version dovecot-1.0.7 on CentOS 5.4. I'm trying to create subfolders and I can't. I've tried Mac's mail application and Thunderbird; they both come up with an error, basically saying that the server doesn't support level one folders(subfolders). Squirrelmail can't create subfolders neither. I did some reading and thought that perhaps the problem lies in the /etc/dovecot.conf file; specifically with the "mail_location" directive. I currently don't have that directive active which means Dovecot uses defaults settings: saving users' mail in the %u/mail folder. Is there any way to configure Dovecot to use subfolders?
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May 4, 2010
I'm somewhat familiar with Linux and became pretty decent at installing and configuring packages in Ubuntu. One of the things I was able to do with my tinkering was set up a functioning imap and pop3 mail server using dovecot-postfix. Now I'm experimenting with Slackware to get the feel of another distro, and I noticed that the mail server packages were already installed. On my client computer they can pick up that I have users configured and my mx record is working.
However it is failing to send mail saying that it is failing to relay the e-mail message and that the server responded 5.7.1 which was a problem that I was having in Ubuntu when first configuring the mail server. The fix was to edit the postfix.conf file and adding the localhost name of my server. Does anybody know of the file that I need to edit to make it possible to relay my messages with both pop3 and imap.
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Mar 1, 2010
I'm looking for a method to sync my calendars on my IMAP server with both my Thunderbird/Lightning any my Blackberry. I found "IMAP Calendar Proxy" here recently, but it has been inactive for 5 years. I've seen people suggesting the use of services like Plaxo and such, but I don't like the idea of a third party messing with my calendars and contacts. Also, I've had to remove several viruses from computers with Plaxo, and I'm not sure if it in itself is a virus or not..... It certainly is a thorn in my side as is. This is for my personal IMAP server, so I'd prefer a free solution even if it is more difficult to install than a paid version. I mainly need it to just sync my calendar to my Blackberry and Thunderbird and couldn't care less about the contacts.
I've been Googling for things for quite some time now, and haven't really found anything that says that it will work with Blackberry and Thunderbird. They really only give a sense of maybe with nothing really defined. I can put on an Ubuntu server to sync everything? I don't want to leave my computer on all the time, and RIM has yet to come out with something decent to sync Blackberries and Thunderbird properly as far as I know.
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Oct 30, 2009
Is it possible in Linux to restrict POP3 or IMAP for particular users.I need a confirmation on this, that it is possible or not in Linux.
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Apr 23, 2010
I've been running Courier IMAP for many years now, but when I added gmail's IMAP to my Outlook I noticed something interesting: when you delete a message, it gets thrown into the trash instantly.
With Courier IMAP (or any other IMAP server, for that matter), when you delete, it first marks it for deletion. Then after you Purge Deleted Messages it either gets rid of them or moves them to trash.
Is there a way to implement this in Courier IMAP?
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Mar 3, 2011
i updated both browsers i have and lost my secure log-in pages (no padlocks showing ) concerning different Web mail accounts.Just before i did these updates i checked an unrelated thing on-line regarding my sound card of which i kept a copy of and got this message below :
!!ALSA/HDA dmesg
!!------------------
[ 12.762633] cfg80211: Calling CRDA for country: AM
[code]....
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May 14, 2011
possible to use a gpg key registered on a different email account than the account I have linked to evolution. As is now, I have entered the key id into evolution, but it does not decrypt my mails. It does not even ask for a password.simply opens the message and displays a page of code.
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Jun 8, 2011
here is my mail log I have setup virtual hosting with postfix and courier examples from my maikl.info file
Code:
8 14:46:46 dynamicweb pop3d: LOGIN FAILED, user=arthur, ip=[::ffff:95.31.15.64]
Jun 8 14:46:46 dynamicweb pop3d: LOGIN FAILED, user=ashley, ip=[::ffff:95.31.15.64]
Jun 8 14:46:46 dynamicweb pop3d: LOGOUT, ip=[::ffff:95.31.15.64]
[Code]...
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Mar 7, 2010
Can ossec be run from ubuntu with less notifications to mail only intrusions. i really dont wish to be notified of every single thing that goes on in my system. i only want to be notified of intrusions and anything else that would be of serious concern. can anyone tell me what setting i can do to achieve the goal in mind ?
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Aug 10, 2010
I'm getting a lot of mail messages with not really any information (that I get anyway) but things like:
@312>
W266>
I372=
[code]...
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Mar 11, 2011
My /var/log/messages file is being flooded by messages like these.
Code:
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Apr 13, 2010
i m using centos 5.4 for Data Server, there i hv shared a directory to store data. i want, when ever owner of that data does delete any thing from directory, system should send me a mail with logs of that deletion action with the detail some thing like bellow
1- IP of system, from where owner did access the server and delete the data.
2- Date, Time and Name of File with Path.
These logs should be sent me by email automatically.
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May 21, 2011
iam working on mail server in redhat centos. i want to know how to secure my mail server for heavy loading , any monitoring tools in GUI or console , is any essential tool which is used in Like MNC for mail server..
i know few command in like top,netstat,etc through google but i willing to know some more
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May 19, 2011
know this is vague but I reallydont know much about securityhow secure is the citadel server
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Apr 20, 2011
I have a server, running Centos 5.5. It runs daily rkhunter and logwatch. From both I get a daily mail.
I have a desktop computer, running Fedora 13 (almost 14...). It runs also a daily rkhunter and logwatch. But I get ONE mail from logwatch, which contains the result of rkhunter.
On the server, I want also only mail from logwatch, containing the rkhunter results. But so far, no luck.
How can I get the rkhunter results in the logwatch mail on my Centos server?
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May 20, 2011
I was recently connecting securely to the website where I have my mail account, and I connected through Tor. When doing so firefox presents me with the screen saying that the connection is untrusted and it can't verify the certificate. So I cancelled. I'm using torbutton and I turned torbutton to off and connected again with no problem. Then with torbutton on again, same thing (untrusted).
Is it possible the exit node I was going through is doing a man in the middle attack? However later when connecting through tor I did NOT get the warning about the site being untrusted. I really don't know what exit node I was using when I got the certificate warning and what exit node I was using when I did not recieve the warning. I don't know how long I stay on the same node or how/when it changes.
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Aug 19, 2009
i configured sendmail with squirrelmail in RHEL5.3
it is working fine. i can send the mail and receive the mail .
but when i try to send the mail a selinux error is coming[but mail is sending successfully ]. i don't under stand this message.
Quote:
Summary:
SELinux is preventing sendmail (system_mail_t) "read" to eventpoll (httpd_t).
Detailed Description:
SELinux denied access requested by sendmail. It is not expected that this access is required by sendmail and this access may signal an intrusion attempt. It is also possible that the specific version or configuration of the application is causing it to require additional access.
Allowing Access:
Sometimes labeling problems can cause SELinux denials. You could try to restore the default system file context for eventpoll,
restorecon -v 'eventpoll'
If this does not work, there is currently no automatic way to allow this access.Instead, you can generate a local policy module to allow this access - see FAQ(url) Or you can disable SELinux protection altogether. Disabling SELinux protection is not recommended.Please file a bug report (url) against this package.
Additional Information:
Source Context system_u:system_r:system_mail_t
Target Context system_u:system_r:httpd_t
Target Objects eventpoll [ file ]
Source sendmail
Source Path /usr/sbin/sendmail.sendmail
Port <Unknown>
code....
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Apr 22, 2010
I like having my terminal transparent, but real transparency makes the text unreadable if it overlaps with other stuff. I usually have compiz turned off so that I can use fake transparency. Is there some way to do this with compiz on, so I can have the wobbly windows?
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