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

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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 ...
3
votes
3answers
21k 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? ...
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 ...
6
votes
2answers
2k 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? ...
2
votes
2answers
275 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 ...
2
votes
1answer
319 views

Possible Hijacked Email Server [closed]

MAILER-DAEMON notices are spamming our email administrator account, causing it to fill up, and bringing down our email server. Our email server is a Virtual FreeBSD box hosted by Verio. Their ...
2
votes
1answer
116 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 ...
3
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 ...
0
votes
3answers
224 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 ...
1
vote
3answers
257 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 ...
5
votes
2answers
472 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
102 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 ...
5
votes
7answers
3k views

Can I reclaim ex employee gmail account?

This is the best place in SE I can find to post this. We have an ex employee who created a gmail account for work purposes that looks like staff_name.company_name@gmail.com He left the company and ...
8
votes
1answer
389 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
480 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 ...
0
votes
1answer
931 views

Email not received when sent by our app, received when sent by outlook [closed]

We have an application that sends mail in bulk, via a mail provider (Mailjet). Our clients are professional organizations, and they send important mails about meetings and stuff like that, to about 10 ...
3
votes
3answers
497 views

Encrypting an email server's local drives or filesystems

Planning to deploy a remote hosted mailer (Zimbra based) I need to make sure the local data on the machine is encrypted. Currently, the plan is to use the built in LUKS to encrypt /opt/zimbra and ...
3
votes
1answer
3k views

Spoofing email From address

Providing all legal measures are taken care of, what are some of the ways someone can spoof an email "From" field address and actually get the email to the recipient without spam filters getting in ...
2
votes
2answers
453 views

How secure is Goodlink for mobile phones when compared to Activesync?

Some of our more technical users are arguing to use Activesync for their phones, while the corporate standard is limited to Blackberry and any device that supports Goodlink. One argument is the ...
7
votes
2answers
956 views

Best practices for email security

I writing a security layer for my app and I would like your input on updating users' email addresses (also used for the login). I'm interested to hear from anyone who has written an application with ...
12
votes
3answers
790 views

Can I expect my e-mail to be routed securely?

If I connect to my e-mail server via SSL (SMTP/SSL) and the recipient also only checks his e-mail via SSL (web/https or IMAP/SSL), does this - generally speaking - increase the security for the ...
13
votes
11answers
1k views

For users that does not use PGP, what would be the other channel to securely send them a document?

I would like to send a document that is confidential to users that have no clue what PGP is (so no point in teaching them how to install it etc...) via email. The real question is how to do that? ...
2
votes
2answers
1k views

Some questions about penetration testing distribution Backtrack 5

I know just the basics of backtrack and I want to ask some questions about it: Can you attack an ftp server using backtrack? an email server? I have a Centos virtual private server and backtrack is ...
7
votes
1answer
2k views

Email SSL security?

I use IMAP and I only access my email through SSL. However, the settings for encrypted email access seem a bit more complicated that https. Can someone explain the security implications of the ...
29
votes
7answers
3k views

Is it illegal to read an e-mail that was accidentally sent to you?

I'm not sure if this is the right website to ask this but I'm giving it a shot. I got the following message in an email today: (it's translated so sorry for the typo's/mistakes) This e-mail and ...
4
votes
2answers
398 views

What questions should I ask a vendor that provides hosted encrypted email?

I am evaluating a service provider that performs the following functions with email: A user logs in to a web based application over an SSL connection. Email is composed in a web browser over the SSL ...
10
votes
2answers
438 views

Is email more secure when not letting any zipped content through?

Ah. This is a bit of a soft question, but I though there might be some here that can share some insight. I'm a developer. Sometimes I need to send a (bugfixed) DLL or EXE file to a customer. If this ...
12
votes
4answers
2k views

Why would someone want to block images in email?

While there is the possibility that this is just to prevent people from viewing offensive images against their will, somehow I don't think that's the reason why pretty much every email client defaults ...
2
votes
2answers
287 views

Company sending Master passwords in unencrypted emails

If a company has terrible security policies like letting people email password in cleartext emails, what to do if they reject all fair minded advice?
7
votes
3answers
312 views

What are common/official methods of reporting spam/phishing/nasty-grams to organizations?

A user of mine just received a phishing email claiming to be the IRS. What methods of reporting are available, and what should be included?
7
votes
3answers
439 views

How Reliably do mail systems transmit Encrypted PDFs

We have an solution design that will be sending Encrypted PDF's to our many clients, who will all be using varied email providers. We have tested the pdf's through the usual cast of internet mail ...
1
vote
2answers
919 views

What are some secure methods of sending email from your server?

This question title might seem a little vague, and I apologize for that. Let me just begin by stating I'm an engineering psychologist—not an IT security or computer guru by trade. As luck would have ...
33
votes
2answers
9k views

What malicious things can happen when clicking on links in email?

I've received a spam from one of my friends (well I'm sure he didn't send it). so there's this link, and i'd thought what exactly would be the implications of clicking the link (i've not clicked it ...
12
votes
6answers
2k views

Identity-Based Encryption - how secure is it?

I was always taught never to invent my own crypto algorithm, and never to trust someone who has a proprietary algorithm. I'm looking at Voltage SecureMail, which uses IBE (identity-based encryption) ...
6
votes
3answers
286 views

How do I securely exchange server logins with remote developers?

I work for a virtual organization (we're all remote) that uses a lot of freelancers/subcontractors. Very often I need to exchange SSH login information with developers working on projects for us. How ...
3
votes
2answers
275 views

Legal process for suing joejobber?

I'm currently being joejobbed, and want to sue the joejobber. Details: I have real damages: the joejob causes me to receive fake bounces, which: stop/delay my receipt of legitimate mail, since ...
3
votes
1answer
357 views

quizrace.com - Malware or just a game?

This quizrace.com quiz game is spreading like a virus all over internet forums and sites like 4cahn, minecraft etc (just google for it) - because it requires you to invite 3 friends to continue beyond ...
2
votes
2answers
482 views

Is it a security issue that Thunderbird only logically deletes emails?

I have several e-mail accounts configured in Thunderbird. I just wanted to move an e-mail from one of my e-mail accounts [A] Trash folder to another accounts [B] Inbox folder. Because the moved e-mail ...
15
votes
2answers
2k views

Does my PGP key really need to match the e-mail address for which I'll be using it?

In considering whether or not I want to join the big web o' trust and put my keys on a key server, I got to thinking about how it would affect my e-mail address' exposure. I generally try to keep my ...
2
votes
1answer
242 views

Is the Gmail activity log still missing activesync?

Is the Gmail activity log still missing activesync as described in this blog post? As it is "someone with my credentials could be reading and sending [email] messages with my account" without that ...
9
votes
4answers
600 views

How to ensure account security when accessing emails when overseas?

First of all, I hope this is the right stackexchange to ask this. Seems to be most relevant here. Now, if one is planning to go overseas and he/she has a lot of data on the email account (say, gmail) ...
6
votes
2answers
1k views

spam with my own domain

At my work we have a very tricky issue with spam. We use postfix, and recently began to receive several spams mail with our own domain. This is obviously very prejudicial for us, because many ...
6
votes
4answers
278 views

Circumventing a “freemail” account form filter

I'll be honest - I want to download a free PDF from a website which requires me to enter my "non freeware" email address. I do have them, but I dont want to use one as I'm afraid of landing up on a ...
7
votes
3answers
1k views

PHP mail() Header Injection Prevention

This site nicely explains the problem. Essentially, nearly all php mail() examples that are given are vulnerable to header injection attacks. The referenced site gives a regex sanitation solution ...