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

learn more… | top users | synonyms

2
votes
1answer
623 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 ...
4
votes
3answers
5k 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 ...
3
votes
2answers
323 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
422 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 ...
5
votes
3answers
957 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 ...
3
votes
2answers
175 views

Email & Domain ownership?

Most hosting companies, such as mine (hostgator) give the following notice when providing a contact email: Email address that you can be contacted at. This should be an email address that is not ...
1
vote
2answers
180 views

Which MTA don't have antivirus check for outbound emails?

I need to test whether MTA has antivirus check for inbound emails. To check this I need to send email with e.g. EICAR testfile from another MTA to this one. However, Gmail, Yahoo and other well-known ...
1
vote
2answers
560 views

Is spam more likely to be sent to info@example.com? Would I be better off using a different address?

I think that when bots gather domain names or process a list of domain names, they create email addresses like info@example.com or support@example.com. Does selecting something different help to ...
3
votes
5answers
893 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 - ...
3
votes
1answer
190 views

How to protect against exploitation of email addresses from an mistakenly expired domain?

I have a domain name that I have registered for a long time. Due to a combination of bad luck and oversight, the domain name expired and was rebought by somebody else. I am attempting to buy the ...
12
votes
7answers
19k views

Can my email account be accessed without the password? How secure is it?

Can my email account be accessed without the password, and how secure is email if I store my personal documents on it? And how come Yahoo Mail asks me to tell them my friends and folders names to ...
4
votes
3answers
335 views

Why don't more services offer encryption for email notifications?

I understand that using encryption for email isn't particularly mainstream (a fraction of a percentage of users, at a guess). Is that the only reason that banks and other sensitive companies do not ...
1
vote
4answers
308 views

Is e-mail sent from a Gmail address to another Gmail address encrypted?

Gmail provides an SSL connection and also encrypts the entire session by default. But if you send a mail, once it leaves gmails servers, it can be read at any point on the internet. But what about ...
3
votes
2answers
691 views

Do fake-address generators work?

There are several pages on the Web that generate fake e-mail addresses so spammers can harvest them; the purpose is to fight spam. (Some examples of this concept under discussion and, in some cases, ...
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?
1
vote
2answers
847 views

Open Source tool to block email attachments

Is there any way to stop users from sending attachments over Gmail or any web based email including private mail servers, if internet access is through a Linux box running Ip Tables/Squid etc. We are ...
9
votes
3answers
1k views

Is it bad to only sign some of a domain's emails with DKIM?

Is it OK if I sign a subset of domain emails, or is this an all-or-nothing game? We use Amazon's Simple-Email-Service for sending e-commerce emails. We would like to sign these with DKIM. This same ...
1
vote
2answers
522 views

If I migrate from dovecot/imaps to exchange will I be less secure?

I have a client using Terminal Server and it would make some sense to use Exchange for email as well, rather than the current situation with postfix/dovecot running on a linux VM alongside - ...
2
votes
1answer
661 views

Implementing 2-step verification via email for web apps?

I was thinking of applying 2-step verification to my web apps that will work similarly to Gmail's SMS/voice 2-step verification, except my web app will just email the verification code each time a ...
2
votes
2answers
431 views

How to investigate possible illegal access by a staff member to emails?

At work we use Outlook 2010 (I think) and an exchange server. The situation is simple: Our IT Manager (Steve) was fixing a problem one of the guys out in the field (Dave) was having with email on ...
6
votes
2answers
603 views

The safest way to access GMail on mobile devices

There are three ways to access your GMail account on iPhone or iPad devices: 1. Use safari browser 2. Use Apple's default mail app 3. Use Google's Gmail app What is the safest way to access gmail ...
10
votes
2answers
3k views

Is encrypted email doctor/patient communication required by HIPAA, HITECH or Meaningful Use

I want to point out, from the start, that I know all about the Direct Project and I am huge fan of work to provide easy-to-use standards based secure email for doctor-patient communication. I am not ...
1
vote
1answer
908 views

How to generate self-signed certificate for S/MIME with usage 'signing' only, like DOD uses

I'm testing a feature to support S/MIME mail signing and encryption. As far as I know US DOD has quite strict standard on these certificates. So that DoD uses separate authentication, signing, and ...
0
votes
3answers
607 views

Are Facebook, Yahoo, Google, etc. hackable?

Just to be clear, I am not asking how to hack in these services, I am just curious. Let me try to explain. Since I know a little bit about computers, people automatically assume I know how to have, ...
5
votes
6answers
3k views

How did the spam email sender get my name?

Some time ago I bought something online from a reputable website. I paid through my credit card and everything worked fine. The thing which is important to note is that the name used on the credit ...
2
votes
4answers
7k views

How commonly are SSL/TLS or S/MIME used by e-mail providers?

I was reading through different posts here about email security. After reading these I still have some questions. I understand that S/MIME can be used to transfer email securely between servers. ...
0
votes
2answers
513 views

Whether PGP is send over MIME?

If I am using PGP to encrypt mails whther it is send as a MIME (Multipurpose Internet Mail Extensions) message, and S/MIME and PGP are used for providing email security. When I send PGP message ...
10
votes
7answers
5k views

Forgotten password or reset link, which is more secure to email?

I originally posted this as a reply here in this thread but didn't get much feedback on it, and now I'm curious as to what others think is the best approach, or if there is any difference between the ...
1
vote
1answer
308 views

Does signing my e-mail with DKIM imply non-repudiation for all my users?

Since a few weeks I have set up my google apps domain to use DKIM for all outgoing mail. Does this mean that everyone that is in possession of a copy of the message can verify that it really ...
6
votes
2answers
286 views

Is it secure to have an “email no longer available” feature on your registration form?

I was just implementing a new feature on the registration form of my site that checks if an email address is still available to register an account with. I am wondering if it is secure to show a user ...
3
votes
3answers
20k views

Why did secureserver.net (godaddy) access my gmail account? [closed]

Why did secureserver.net (godaddy) access my gmail account? One day later...gmail reports suspicious activity...really? So...Why did secureserver.net (godaddy) access my gmail account? ...
6
votes
2answers
2k views

Is e-mail a direct vector for XSS

I'm curious if there is a way to execute XSS via email. I am not talking about using e-mail as a way to deliver a link that has reflected XSS in it. I'm talking about sending an email from ...
16
votes
5answers
2k views

How does preventing automatic download of pictures help to protect my privacy?

When viewing some emails in Microsoft Outlook, if the sender has included images, I get the following option appear at the top of the email: "To help protect your privacy, Outlook prevented ...
5
votes
1answer
118 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
3answers
5k views

Why would someone register a Facebook account with a stolen email address?

I witnessed an interesting attack today. Someone was able to register a new Facebook account with the email address of a friend of mine. We don't know how it happened, because Facebook requires you to ...
2
votes
2answers
268 views

Is it unsafe to allow apps other than Outlook to send email via the Exchange server?

My application is a .NET Windows Forms client, one of whose functions is to allow the user to send personalised mailshot emails to opted-in recipients stored in the database. The emails are sent ...
5
votes
2answers
1k views

If I send an email over SSL, will it always be transmitted over SSL?

This is largely a question of how MTAs and different components communicate. I'm curious that if I send an email using SMTP over SSL to my MTA, can it's next jump to the next MTA or MDA be insecure? ...
10
votes
4answers
2k views

How do I encrypt the source and destination IP address, along with various parts of an email?

If the subject makes no sense to you, that's fine, it makes no sense to me. I've been tasked with securing emails sent from some devices, and I'm looking for advice on intelligent questions to ask to ...
7
votes
2answers
6k views

Malicious users trying to create yahoo accounts with random emails at my domain?

Recently, I have been getting a string of emails from yahoo with people trying to create accounts or add email addresses @mydomain.tld to their account. I was wondering if anyone else has seen this ...
1
vote
1answer
112 views

Should the email server/application be protected by 2 factor authentication? What applications should be protected?

When should email be protected by 2 factor authentication? Suppose a given company is in an industry where two factor authentication is offered to some or all of its clients. Does this mean that it ...
2
votes
1answer
2k views

My S/MIME certificate (created with OpenSSL) does not match my email address

I created a certificate with OpenSSL and following commands: openssl req -x509 -nodes -days 365 -subj '/C=DE/ST=state/L=city/CN=hostname' -newkey rsa:1024 -keyout mycert.pem -out mycert.pem ...
1
vote
3answers
826 views

OWA Keep-Alive in http, even though it should be forced https

Yesterday, I got an alert from a client's IDS that a Base64 auth packet was detected. Looking at the Ascii decode, I can see that it is for their OWA (Outlook Web Access), and indeed, the auth info ...
1
vote
3answers
249 views

Is email between 2 parties secure if both mailboxes are on the same server and both clients use SSL?

Sorry if this is incredibly basic, but I'm not very familiar with how SMTP works. I have a mail server (running Postfix with Dovecot) with an SSL cert from a well-known/accepted CA installed and ...
0
votes
3answers
217 views

What is the most reliable way to transfer emails without specific recipient support?

Many suggestions on transfering emails securely can be found in this answer. But many of them (e.g. PGP) need support from recipient. I want to provide SMTP email server that will route emails of it's ...
5
votes
2answers
469 views

How might an email do damage merely by being opened?

E.g. http://www.dailymail.co.uk/sciencetech/article-2094982/Threat-new-virus-infected-emails-PC-DONT-open-attachments.html?ito=feeds-newsxml Assuming that the user clicks no links and opens no ...
1
vote
1answer
99 views

Detecting and Responding to Email Account Compromise (regarding FINRA 12-05, ISAC/IC3 alerts)

FINRA, the ISAC and IC3 issued an alert regarding e-mail based attacks that attempt to obtain client contact information. They then use social engineering / persuasion to complete the attack. What ...
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 ...
8
votes
1answer
368 views

Protecting emails in your database

It's common to encrypt passwords in the database, but I'm wondering what solutions are out there to protect emails in your database. Not just from hacking, but from disgruntled employees or engineers ...
2
votes
1answer
3k views

What algorithm/encryption type does Gmail use for security?

In the wake of the recent database hacks, i.e. Sony, Gawker, etc.. where the hackers have access to the hashed usernames and passwords, i've been more keen in paying attention to the sites and ...
2
votes
3answers
470 views

Security issues with email accounts

I am starting to become wary of giving out my email account to anyone, just by doing reconnaissance it is evident how easy it is to pull so much information from a person just by a email, There is a ...