I developed a program that sends emails (with attachments to clients). Now, some of the clients are asking what they should do with the emails with UNKNOWN_PARAMETER_VALUE.DAT? I'm quite sure that I've not sent attachments with those names. Only a few of the clients have received attachments with this. Is this a virus? If not, is this a MIME problem (FYI, some attachments have Chinese filename, I'm not sure if this might be a probable cause).
It looks like a virus. At least it's listed here.
Related
I am trying to assess the Spamminess of E-mails. The emails are received in Maildir (on Linux server) via Postfix.
I am completely new to the E-mail domain. So I am curious about the following things:
Do the emails with attachments usually pass through the spam filters?
Is there a size limit (attachment size) that decides this?
My actual question is (when the emails have attachments) will SpamAssassin take longer than usual to assess the email? I am using the Linux version of Apache SpamAssassin.
I can easily extract different parts of the email (including images/PDFs) with JavaMail but, at the end, when I try to pass the file to SpamAssassin, the process never ends. It works fine for smaller attachments (30-40 KB) though.
Did anyone face the same problem? Suggestions are much appreciated.
Thanks!
i'm running a mail server that serves mostly architects. the usage of those guys in email is mostly for sending files. today, our mail sending files is limited to about 20MB but the limit is because many webservers reject email that are bigger then 20MB.
what i would like to achieve is that when sending files that are larger then 20MB just to save the files aside and generate a link to download instead.
i would like to know:
are there any plugin to courier that do it?
what tools to i need to use to develop such a plugins?
How to make MTA replace large attachments with links to a centrally-stored copy [MIMEDefang Milter for sendmail/postfix/...]
You may consider using MIMEDefang milter available under GPL license for sendmail and postfix.
MIMEDefang Description
Mail Inspection and Modification
MIMEDefang can inspect and modify e-mail messages as they pass through your mail relay. MIMEDefang is written in Perl, and its filter actions are expressed in Perl, so it's highly flexible. Here are some things that you can do very easily with MIMEDefang:
Delete or alter attachments based on file name, contents, results of a virus scan, attachment size, etc.
Replace large attachments with links to a centrally-stored copy to ease the burden on POP3 users with slow modem links.
[...]
I am working on a program to parse ARF (Abure Reporting Format) messages. It turns out I need to be able to handle Hotmail feedback loop messages as well.
Does hotmail use ARF for its feedback loop message? If not, which format is it using?
I found this site providing a perl parser to convert hotmail messages to ARF format which make me think it is not using it.
I read somewhere it was using JMR (Junk Mail Reporting) but I can't found any example of such a message on the Internet.
Microsoft, as usual, has come up with their own proprietary alternative to the standard (at least they're consistent, I guess) called JMR - Junk Mail Reporting.
No, unlike e.g. AOL Hotmail doesn't use the ARF. Instead you'll get emails with the subject "complaint about message from [ip]* from "staff#hotmail.com", which contain the original body.
Mozilla Thunderbird can save e-mails as .eml file. Is this a common e-mail format — can all other common e-mail clients open such a file?
MS Outlook I am sure reads them, along with the old outlook express, and I believe the new LiveMail program. Of course, I guess not all email programs necessarily read them, but I would expect the common mail programs to do so.
I need to be able to make a program that looks through a mailbox of bounced messages, where the messages come back with the initial message in a .msg attachment, and open the .msg attachment for processing in ASP.NET 2.0. Is there any sort of code that might help in this? I've been looking at Reading Email using Pop3 in C# as a starting point, but can't figure out how best to open the attachment from there, or if there's some easier way I'm missing.
From your post, it appears that you are better off getting a third party component that had already implemented (POP or IMAP) the protocol.
I just googled and got one and I bet there are a bunch out there.
http://www.jscape.com/articles/retrieving_email_pop3_csharp.html
Parsing bounce messages in general is a huge task, because their formats vary greatly between different mail transport agents. So unless you are on a closed network, or you only care for bounces reported directly from your own transport agent, then you are in for a big job, and you certainly cannot count on the original messages being attached in full to the bounce answers.
If it is possible for you to regenerate the outgoing mails from a few key parameters, then you might want to consider using a VERP addressing scheme instead. Your parsing job would then be reduced to recognizing and deciphering the recipient addresses of the bounce messages, instead of their full content.
I ended up going with a solution involving reading in the messages using Microsoft.Office.Interop.Outlook ( http://support.microsoft.com/?kbid=310244 ), saving the attached .msg to the drive, then finally reading in that message using an open-source third party solution ( http://www.codeproject.com/KB/office/reading_an_outlook_msg.aspx ). It's probably not the most efficient solution overall, but it handles the specific case we needed to support.