Related to email protocols, clients, servers, content, and message format.

learn more… | top users | synonyms

4
votes
5answers
575 views

Is snail mail or HTTPS webmail safer for sensitive information?

I've been curious about the safety of e-mail lately. As far as I know, the most vulnerable point of communication is the local network you send your mail from. That is unless you're trying to keep ...
18
votes
5answers
1k views

What are the supposed security benefits of a “dead-drop” email strategy?

This was in the news recently. Here's what they were said to have been doing: Petraeus and Broadwell apparently used a trick, known to terrorists and teenagers alike, to conceal their email ...
3
votes
3answers
323 views

I found a malicious website embedded in Malware spam. What should I do?

An email is using social engineering to get users to click on a malicious URL that downloads javascript and then runs malicious code. Who should I report these malicious URLs to? (Microsoft ...
0
votes
3answers
291 views

Petraeus scandal - what would have been a better way to communicate electronically [closed]

Not a security professional here but .... having read through how it happened, it's clear sending these emails from the shared account by Paula Broadwell was the problem (if I understand correctly). ...
3
votes
4answers
2k views

CAPTCHA or email confirmation?

I have read that captcha isn't a perfect solution to protect a website where for example the user can create an account, since there are many people in different countries that practicallty read ...
3
votes
2answers
275 views

Is my email client violating my privacy?

There are many ways that emails can be used to violate the privacy of the recipient (Return-Receipt-To:, web bugs, iframes loaded from an external page, and other email tracking methods). It may be ...
7
votes
3answers
1k views

Hashcash, is this really used?

I just heard about this term, is it really used? The concept does not seem new, is it used and/or implemented in current technologies?
6
votes
2answers
208 views

Is DKIM needed for emails encrypted with OpenPGP?

DKIM seems to prove that a message came from where it claims to be from. However, OpenPGP encrypts the entire email and signs it which obviously proves it also came from the person it says it did. ...
4
votes
2answers
207 views

How to refuse delivering emails that are not signed by trusted PGP keys?

I'm fed up by spam and would like to have an email address that will only deliver mails signed by users I declared trusted. Some kind of purgatory for mails the signatures of which are trustworthy by ...
3
votes
2answers
215 views

What are the security or privacy issues with allowing users to forward email from our Google Apps account to their personal Gmail?

But we have a new employee that would rather all his email in one inbox. I know he can forward the mail to his personal account, send mail using an alias so that it looks like it is coming from the ...
4
votes
3answers
4k views

Suspicious email with my information in it: what do i do?

I just received this email: Billed To: d**********@****.NET John ****** Order Number: M1V62***2711 Receipt Date: 07/12/12 Order Total: $699.99 Billed To: Credit card Item Number Description ...
1
vote
2answers
255 views

AV inserting email header logic

I want to write a small PHP emailing class to be able to send HTML emails. My problem is that in the receiving email an antivirus will insert a header which sometimes simply breaks the entire email. ...
1
vote
2answers
168 views

IP attack by reading/writing data?

If I remember correctly there is an ICMP attack whereby you can embed malicious code and it gets read/executed, causing the problem (similar to SQL injection). Are there any further/more dangerous ...
2
votes
1answer
662 views

Hosted Email Hacked, SQL injection maybe?

I have a hosted website using a free hosting service, I received an email this afternoon saying that I have been suspended because my account has been compromised. Basically, someone is using my ...
5
votes
3answers
870 views

Is TLS flawless enough to prevent eavesdropping carried out by an ISP?

I would like to "secure" my email, http servers and desktop client by connecting exclusively over TLS, be it email, in/out:80 or just regular "web surfing" traffic. Will that prevent ISP and ...
-2
votes
2answers
419 views

Learn IP address of sender of a self-destructing email

How can I know the IP address of the sender who sent me a self-destructing email? If not the IP address... what all information can be extracted?
4
votes
2answers
475 views

what are some instances of compromises due to email sniffing?

Since emails are usually sent in plain text and bounced through a bunch of SMTP relays it is potentially possible for a well placed attacker to sniff for these and read emails without being able ...
5
votes
1answer
117 views

How long can I store personal information on unconfirmed subscriptions?

I have a monthly newsletter. In my subscribe form I use a double opt-in method: The visitor subscribes. I send him a confirmation email. If I receive a reply, I add him/her to my system. In the ...
11
votes
5answers
566 views

what would be a good way for a doctor to send xrays encrypted to another doctor?

As a dentist, I often want to send medical information including digital xrays to another doctor. What would be a good/easy way to do this encrypted? Our organization currently requires that all ...
1
vote
2answers
2k views

Avast says I don't need to use encrypted connections for my e-mail accounts

I am using Outlook 2010 and Avast anti-virus 7. Whenever I add an account to Outlook if I choose to use SSL for incoming or outgoing connections Avast alerts me I shouldn't use it because Avast can't ...
3
votes
2answers
930 views

I'm currently receiving a targeted attack

Since yesterday, I receive forged mails which are targeted at me. They use personal information, seem to come from one of my friends and only contain links to these web sites: http ...
3
votes
1answer
173 views

Amavisd-New and Google safe browsing

I am studying the Google Safe Browsing. How do I know that it is possible to intercept a content of an email via amavis, I wonder if I can, for each url found, consult the Google safe browsing? Do ...
1
vote
3answers
622 views

Instant access to application using token in url

Is it good idea to give access to the site using token in url, this token can be send via email, some sites have reset password done in this way, but I want give access to the whole site (I think I ...
2
votes
2answers
167 views

E-mail Server Security

In recent news, Bitcoinica was compromised by an e-mail server infiltration. The hacker then applied social engineering, using one of the administrative e-mail accounts to reset the root credentials ...
0
votes
2answers
350 views

Can a man engaged in phishing be prosecuted if I know his IP?

My familiar received some emails from a man she meets at dating site. The man sent her his photos by email. In them he made some attempts that looked like phishing so I decided to lookup more ...
3
votes
3answers
934 views

How “enforcable” are email disclaimers

Perhaps a more policy questions, and undoubtedly different in differnet parts of the world, but enterprise email "signatures" often include a snippet simmilar to the following: This email and any ...
3
votes
2answers
2k views

Send credit card info by email from HTTPS and SMTP on SSL

A client asked me to receive credit card info of his costumers by email. I know that is a very very not secure way ... But if the page with the input form is on HTTPS, and then i use a smtp (like ...
5
votes
3answers
355 views

Are there any regulations against financial companies storing passwords in plaintext?

A bank that I use stores my password in cleartext or perhaps using reverisible encryption, which is just as bad. I know this because when you click "Forgot your password?" (or similar) link, it ...
-1
votes
2answers
193 views

What are the security advantage of new redirecting method used by Gmail and Facebook?

When clicking on the any link in gmail or Facebook,it redirect to that link by some other ways. What are the security advantage of new redirecting method used by gmail and Facebook?
2
votes
4answers
157 views

The email system is compromised - what can you do?

I have a friend at a 7 person company which has an issue with email confidentiality. Each time they send out an email with quotes to customer, the competitor get the message in 30 minutes and send ...
2
votes
2answers
146 views

Are these email captchas legitimate?

The last week, I've been getting this kind of emails to addresses that I don't use: Dear Sir, Madam, For security reasons and as part of our ongoing fight against spam, it is our policy not ...
-3
votes
3answers
159 views

I use an online email provider - how can I test my password strength?

I want to test my password strength, is there a program out there that can crack my password relatively quickly? I am familiar with BackTrack 5, but I usually use it to test WEP password strength. I ...
1
vote
1answer
397 views

Are there any security issues with importing mail via POP/IMAP?

I'd want to design import mail functionality for an email provider. The process is: user enters email and password for another service at my site and then site accesses another email provider and ...
0
votes
0answers
216 views

What is the most secure way to recover password online? [duplicate]

Possible Duplicate: Can anyone provide references for implementing web application self password reset mechanisms properly? I have website which sends generated password to any person who ...
1
vote
3answers
233 views

Recently received a odd email

http://photomi.co.kr/httpcnbc9home-2.com.php?subpage216 Learn How to Make Money 0nline Fast __________________ . louanne visszakuldod Sun, 22 Jul 2012 0:33:42 Is there a way to identify what ...
1
vote
2answers
512 views

Is it possible to fake the mail server address?

Suppose that I send an E-mail to someone. Is it possible to fake mail server address - for example, while I used my own local mail server, I send it as if it was sent from Microsoft mail server. (I ...
0
votes
2answers
618 views

How to encode letters in multipart/form-data to include CR/LF characters?

Part of HTTP request that should be sent to server with Content-Type: multipart/form-data; looks like: ------WebKitFormBoundaryQ7KGYev31biaJTW8 Content-Disposition: form-data; name="subject" ...
2
votes
1answer
606 views

Advice if safe from mail header injection PHP [duplicate]

Possible Duplicate: PHP mail() Header Injection Prevention Since I only started learning about header injection in the PHP mail() function, am uncertain if the form/code below is vulnerable ...
-2
votes
2answers
379 views

End of mail spoofing?

I've made the simpliest e-mail program in C#. using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using ...
3
votes
1answer
167 views

Facebook changed the default email address for every contact. How do I mitigate the impact and risk?

Facebook created a problem for regulated industries and Registered Investment Advisers (RIAs) by changing the default outgoing SMTP address for every contact to a @Facebook.com address. This is an ...
2
votes
4answers
2k views

If a hacker were to compromise a GMail database

Assuming the systems that store the Gmail database is compromised what is preventing them from reading everyone's emails by looking at the data in the database? I assume nothing, and in order for ...
7
votes
5answers
2k views

Privacy issues with email providers [closed]

I am looking for an email provider (or for a way to do it myself) that will not divulge my personal information under no circumstances. I found out that getting this information with a order for ...
1
vote
1answer
480 views

What user was this spammer trying to authenticate as?

I have a custom application that monitors and logs a user's SMTP session, and came across this spammer trying to use my MTA as a relay. Is it possible to determine what username they are trying to ...
4
votes
3answers
2k views

Delivery Failure Notification spam protection?

My domain (example.com) has recently been targeted by spammers who are sending email (somewhere) but forging the sender as random-name@example.com. I have been getting flooded by delivery failure ...
1
vote
2answers
926 views

How is mail automatically sent from my account?

Today I have received an email with an 'out of office' notification, as a reply to one of my emails, which I actually didn't send. I think it was sent automatically from my address, as a result of ...
2
votes
1answer
317 views

Is there any reason to not use DKIM, SPF, and SenderID because it affects plausible deniability?

Is there any basis in not deploying anti-spam (or deliverability) technologies like DKIM, SPF, and SenderID because it affects plausible deniability? Some definitions to get everyone on the same ...
3
votes
2answers
313 views

Securely storing (email) lookup database

Looking for suggestions on implementing a server-side lookup table, where the key is an email address. Goal: Keep these email address private, even if data on the server is stolen. Assumptions: The ...
3
votes
1answer
410 views

Is the Netscape SMIME extension still required in a certificate?

Every Windows 7 host has a Trusted Root certificate from Entrust that has the "Netscape Cert Type" extension (see image) I'm comparing inter-operable S/MIME extensions and see a pretty diverse set ...
3
votes
5answers
781 views

Clicked on fake “Download Now!” ad on file transfer site (legal file for legit purposes) by accident; does anyone know what measures I should take?

I was sent a file by a coworker via "sendshare" - my first time using the service. The page loaded a bit slowly and the ads came in before the actual download link. I was in a hurry to get the file - ...
5
votes
6answers
343 views

Spam fighting idea

I have this crazy idea that spam e-mail would not be worth the time of the senders. This is how it's going to work. Someone sets up a reputation-based site, much like stackexchange sites, where ...