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

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1answer
95 views

Would this form of more seamless e-mail confirmation be secure?

When you ned to confirm that an email address belongs to a certain visitor to your site, would it be insecure to do it as follows: When the user visits your site, you give them a session token as a ...
-1
votes
1answer
81 views

What are the security features of the proposed “secure email” from Brazil? [closed]

Brazil has announced that they will create a secure email alternative in light of NSA spy programs. The company Correios will be implementing the contract over the next year or so. What are the ...
1
vote
2answers
530 views

Email spam targeted at a pair of users

Two users on my domain are receiving spam emails that have both of their emails in either the To: and/or CC: fields. There are many other users on the domain, but only these two are receiving spam ...
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votes
2answers
405 views

gmail account hacking [closed]

I keep getting messages that my sign in to my gmail account has failed. I am not trying to get into my account. I did go in and change my password this morning because of that. What do I do now? I ...
8
votes
6answers
4k views

How can I send emails anonymously?

How can I send email anonymously? We used to track email's IP and its location based upon the email headers, and there are many possible ways to track the email's id's which were sent by the anonymous ...
9
votes
1answer
1k views

Do any Exchange hardening guidelines recommend disabling OWA Webready? Should they?

For the fourth time in over a year, Exchange OWA has put our internal network at risk due to a remote code execution flaw that exists on the server runtime. This risk is compounded by the fact ...
1
vote
1answer
92 views

Bootstrapping dual SMIME certificates for signing and encryption?

To maintain the non-repudiation property of signing while still having escrow for the encryption key, it's recommended to have a separate certificates (and pub-priv keys) for signing (say CertSign) ...
0
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1answer
198 views

email on hosting company's site hacked?

I have a friend who's has a site hosted by a company in the states. They think that someone has gotten access to their email account because any requests for support submitted via their website ...
1
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1answer
379 views

While copying data from any email client to a USB device what residue information is left on the PC?

I often end up using netcafe's for browsing web (Windows 7). I recently wanted to download some secure data from my gmail account on to the USB pen drive. So, I went ahead and opened the attachment ...
5
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1answer
381 views

Safe to drop email verification when using Facebook login

If a user registers an account on my Website with Facebook authentication, can I safely skip the "verification email" that is usually sent to users who sign up without Facebook (that is, from a ...
-1
votes
1answer
524 views

Secure Portable Mail Client [closed]

I want to store all my email on a portable client on a USB drive if possible. My aim is to protect the stick with an encryption if possible so that if I remove the USB stick all traces should be gone. ...
3
votes
1answer
773 views

What's a trustworthy S/MIME Certificate Provider that generates my private key in my browser?

I read this question on the process of generating a private S/Mime key. I looked at Comodo - which offer free e-mail certificates. I'm trying to find out whether Comodo generates the private ...
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2answers
1k views

Safe to email images with personal information? or use encryption for images?

It's common knowledge not to email credit card numbers or other personal information. How about emailing photographs that contain personal information, such as a photo of a deposit? Regarding plain ...
4
votes
4answers
2k views

What is the easiest way for a newbie to RSA to create & use a key pair on Windows?

So I need to get a block of text sent to me over email from a friend, but before he sends it he wants a public RSA key from me. Am wondering what is the simplest way for me as a newbie to generate ...
3
votes
3answers
826 views

Where to get/buy a CSR generated S/MIME certificate

I'm not sure if the question is eligable for this board as I ask for concrete service providers which can be kind of advertisement, but there is also technical issue involved, so I give it a try. My ...
1
vote
1answer
622 views

Is server-side cryptography with user-only access possible for email services?

I came across the Lavabit High Scalability Writeup and got curious. Do you use any particularly cool technologies or algorithms? The way we encrypt messages before storing them is relatively ...
15
votes
3answers
396 views

What expectation of privacy is there with US-based vendors with the LavaBit and SilentCircle shutdown?

Lavabit hosts a secure messaging service that was recently shut down. Likewise SilentCircle has preemptively done the same thing with their email-based service. It seems that the justification for ...
10
votes
5answers
865 views

Is there any security benefit of not using email services recently associated with PRISM?

After the recent disclosure of several major email providers cooperating with NSA, is there any real security benefit of not using these email services and choose some alternative instead? Such as ...
0
votes
2answers
293 views

Danger in opening spam emails on Ubuntu operating system [closed]

Some emails are suspected to be viruses; Because of that, the email service store categorizes them as spam. Or some pages are suspected to be viruses, and new browsers classify them as harmful pages. ...
3
votes
3answers
399 views

How to know if mail is for tracking our IP

Consider if I have got a mail from a colleague on my GMail, and it has got some images or attachments in it. Gmail asks for "Show Images" option to explore images. My query is that how can we get to ...
1
vote
2answers
476 views

Alternative Email Provider [closed]

As a continuation to Why would someone trust DuckDuckGo or other providers with a similar privacy policy? it seems like we already have a secure way to make a search without writing history and etc. ...
5
votes
4answers
2k 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?
7
votes
2answers
464 views

Is personal email hosting really secure?

One of my friends has his own personal email hosting. Let's assume for the sake of argument that it is "secure", meaning that no third party can read the emails in his server either through hacking or ...
6
votes
1answer
187 views

What's the best duration for storing e-mail? [closed]

We’ve all become so accustomed to using email in our daily personal and working lives that we really don’t give a whole lot of thought to it. It’s the fastest way to communicate with others in the ...
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votes
2answers
148 views

My VPS has been shut down now again for the second time for TOS violations, and I really need some help. [closed]

My VPS has been shut down now again for the second time for TOS violations (email spam), and I really need some help. I have been battling with my server being attacked for over a year now. Most of my ...
12
votes
7answers
25k 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 ...
5
votes
1answer
909 views

Thunderbird - what happens if Gmail SSL cert gets spoofed?

I use a good MUA: Thunderbird [to read/reply to my emails on Gmail]. So: what happens, if i go to a place, where is public wifi, and someone tryes to sniff my password/username/emails? Questions: ...
5
votes
2answers
319 views

Security of PGP for Long-Term Storage

How secure are PGP/GPG encrypted mails? I realize that it's probably fine for regular e-mail scenarios, but what about the security over longer time periods (>30 years)? Is the 4096 bit limit for ...
1
vote
1answer
220 views

If a hacker gets into my PC can he get to my saved windows live mail passwords?

If a hacker gets into my PC can he steal my emails passwords? I use the windows live mail client to manage my email and I have saved my passwords when it asks me to save them. I run like 9 mail ...
1
vote
1answer
4k views

Which IP address in email headers is the sender's? [closed]

I have the headers from some emails I've received. There are several IP addresses in these headers. Which one belongs to the sender? Is the address in the headers reliable? Example 1: Delivered-To: ...
3
votes
3answers
99 views

Security of remailers

A layman's question: If I don't err, with remailers or analogous systems one sends a message to a node of a chain of nodes, which collectively perform the entire transmission. However, the message to ...
2
votes
1answer
344 views

Why should I pay for an email S/MIME certificate?

There are quite a few SSL certificate companies out there that offer free email S/MIME certificates. There are also paid versions as well. I need about 6 email certificates for some company email ...
2
votes
1answer
229 views

Using X-actual-recipient to divert email

Has anyone noticed exploits involving the use of "X-Actual-Recipient" to covertly divert e-mail from an intended recipient to someone else? I have been told that only someone with root access on the ...
3
votes
2answers
909 views

Can unencrypted email be read or altered while it is in transit?

If email is not secure while in transit, exactly how can it be read by unintended parties? Can an attacker read SMTP traffic while it is between the sender and recipient?
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votes
1answer
236 views

Spam mail from my yahoo mail [closed]

Couple of days back spam mail(screenshot link) was sent to all my contacts from my yahoo account, and in my account activity page there is a yahoo partner logged in, from Peru (screenshot link) during ...
5
votes
4answers
482 views

A Secure Email Host Architecture

How would one go about creating a secure email architecture? I'm thinking specifically about protecting email from routine surveillance from oppressive regimes and corporations. I had a think about ...
2
votes
3answers
1k views

When to use SSL ? / When to send passwords via mail?

Self-Proclaimed Experts are quick to say that for every time a password is being transmitted from a webserver to a user and vv, you need to use SSL. Because there will be people each time trying to ...
-2
votes
2answers
701 views

How to minimize your fingerprint, or become invisible on the web? [duplicate]

With all of these news stories about the government reading emails and snooping information from other sources, what are ways to minimize or eliminate an organization's ability to actually track and ...
-2
votes
2answers
188 views

Security and privacy in email and other communications [closed]

In the light of newly discovered events like the NSA's PRISM program, I'm really concerned about the privacy & security of my personal emails. Chances are governments already have backdoor access ...
-2
votes
1answer
193 views

Stopping spam and worms with SPF [closed]

Sender Policy Framework is a system to detect spoofed emails. From http://www.libsrs2.org/overview.html : WHAT EMAIL FORWARDING SERVICES NEED TO KNOW ABOUT SPF To combat spams, worms, and ...
5
votes
5answers
4k views

How secure is using CRAM-MD5 for email authentication, when not using an SSL connection?

Background: My current server-provider tells me it's no problem to store the passwords in plain-text in the database, saying he has to do so because they use CRAM-MD5 for email authentication. My ...
6
votes
3answers
169 views

Obtaining e-mail address at registration

In a registration form the user is asked for his e-mail address. The e-mail address will be validated for the correct format (e.g. at the least contains @) and I'm considering checking if it's already ...
-1
votes
0answers
247 views

Email sender and account hacked [closed]

One customer got their email account "frozen" because it sent 9000 emails and some bounced back. I suspect something got hacked, but I have no idea what to do. I cannot figure out what was hacked. ...
3
votes
1answer
216 views

What is the security purpose behind the “enable editing” of MS Word?

Whenever I open MS Word documents from my email, they open in "Protected View" with edit options disabled by default. As per my understanding, the hyperlinks used in the main document would be linked ...
107
votes
9answers
12k 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 ...
6
votes
4answers
270 views

Technical security issues with proactively executing a phishing campaign targeting your own users

We've had some issues with compromised accounts due to users falling victim to phishing campaigns. The possibility of us doing a phishing campaign against our own users to proactively shame them has ...
3
votes
1answer
217 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 ...
4
votes
3answers
167 views

Do email clients reduce security?

I have recently taken a security course, and have learned a lot about, among other things, the way passwords are stored, etc. Afterwards I was thinking about the way that passwords are stored for ...
5
votes
4answers
800 views

Safe to reply to a suspicious email?

Can something happen to me (or my computer) if I respond to a suspicious plain text email? I received an email from an unknown address, and I am not sure if this is a "real" person. I would have ...
0
votes
2answers
235 views

“You have new mail” message

I received a message from Google saying someone entered my email account. I confirmed that there were an access from an IP in another country. I have noticed "You have new mail" message when I open ...