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

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2
votes
1answer
1k 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
792 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
243 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
213 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
463 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
97 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
359 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
2k 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
451 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 ...
2
votes
1answer
312 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 ...
11
votes
3answers
9k views

Is a password protected PDF file safe for bank statement attachments?

My bank emails my monthly statement to me in a password protected PDF attachment. Is this a secure method of transmitting something as sensitive as bank statement?
0
votes
1answer
817 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
434 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 ...
92
votes
9answers
10k views

How can PayPal spoof emails so easily to say it comes from someone else?

When I receive a payment in PayPal, it sends me an email about it (pictured below). The problem is that the email is shown to be coming from the money sender's email address and not from PayPal ...
3
votes
3answers
173 views

Resources/tools for controlling access to corporate email on smartphones

If one of our employees has access to corporate email on a smartphone I want to make sure that if they lose the phone then whoever finds it can't get at any corporate email on that phone. For iOS ...
7
votes
2answers
887 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 ...
15
votes
4answers
15k views

Is it possible to easily retrieve Thunderbird's passwords with access to HDD?

I know Firefox 8 stores it's passwords in a SQLite database, which can easily be stolen with access to the HDD! What about Thunderbird 8? How does it store the passwords and how can one retieve them? ...
8
votes
5answers
3k views

How to catch a gmail hacker/money-scammer? (in conversation with one right now!)

My friend's GMail account was recently hacked and the perpetrator sent out one of those classic "help I was mugged, I need money" style e-mails. (Edit: I know it's legit; my friend called me to tell ...
3
votes
4answers
495 views

What Gmail features should be Opted-Out to prevent PII from being indexed?

The Massachusetts and Nevada PII laws require all email with SSNs or other personally identifying information to be encrypted (TLS or otherwise). Of the free email providers, GMail does support TLS ...
12
votes
3answers
658 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 ...
14
votes
9answers
5k views

Encrypting email for gmail

My friend who is an accountant was asking me what the best way to exchange documents with clients. He was trying to tell me that just sending via email was sufficient and I told him he was insane. I ...
5
votes
4answers
1k views

Email header IP address

Do the IP addresses in an email header include information from the device from which the mail is being sent, or from the mail server?
22
votes
5answers
24k views

Is it still unsafe to email credit card number nowadays?

We all know not to do it, but someone emailed my credit card number and cvv code to my gmail. I'm wondering if the risk is so low I don't have to call to cancel my card. The email is sent from a ...
26
votes
4answers
14k views

How does PGP differ from S/MIME?

Is S/MIME an abstracted system for general MIME type encryption, whereas PGP is more for email? Why would I want to choose one over the other, or can I use both at the same time?
2
votes
2answers
433 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 ...
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 ...
6
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 ...
4
votes
2answers
375 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
436 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 ...
4
votes
4answers
2k views

Is there any way to set up secure email for Network Solutions domains? [closed]

I'm trying to set up any mail client to have a secure connection to Network Solutions' email servers. I've been talking with Network Solutions' email support people, who will repeatedly state that ...
2
votes
2answers
278 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
429 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
821 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 ...
24
votes
4answers
13k views

What steps do Gmail, Yahoo! Mail, and Hotmail take to prevent eavesdropping on email?

I would like to ask what happens when an email is sent from gmail, yahoo or hotmail public web email services? I don't understand email protocols in details, but as far as I know email traffic is ...
7
votes
3answers
300 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?
13
votes
2answers
4k views

Paypal Account created using my gmail account

Some time ago, probably about 6 months, somebody hacked my email account and used gmail settings to forward my emails to him/her. I noticed that, removed the forward and changed the password. Now, I ...
20
votes
5answers
62k views

How to find out the IP address of email sender in Gmail

Gmail doesn't give the IP address of the sender in its mail headers for security reasons. I'd like to know whether there is some other way of getting the IP address of the sender. Since Gmail ...
6
votes
3answers
282 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 ...
11
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) ...
17
votes
4answers
841 views

Is it a bad idea for an information holder to e-mail a user their password?

A couple of websites with which I'm registered have, after a period of inactivity on my part, each sent me an e-mail to remind me that I'm still registered. In each case, that e-mail has included my ...
2
votes
1answer
2k views

Email Spoofed. Explain?

So, I think my email id might have gotten hacked. Can some one offer their comments and suggestions on this email ? It seems this email went from my mail id to my friend's email id. The subject is ...
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 ...
2
votes
2answers
467 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 ...
11
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 ...
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 ...
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 ...
7
votes
4answers
360 views

Next steps after webmail account was compromised

John Doe told me the following story: I got a mail from a good friend. It just contained a single link. That seemed odd but I didn't think a lot about it. After clicking on the link, the web site ...