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

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3
votes
1answer
400 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
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 ...
3
votes
1answer
130 views

Flood of email messages from @attacker.com

I've been getting the weirdest email messages for the last 2 days on my personal gmail inbox. On May 28th, exactly at 4:33 pm BRST I got about 2,000 emails that look exactly the same, here's the ...
3
votes
2answers
132 views

Random token and email confirmation key of 10 chars sufficient?

I have a function that returns random unguessable keys with the following characters: a-z A-Z 0-9. I have set the key length to 10 and I am using that for my form tokens to prevent CRSF and I will be ...
3
votes
1answer
84 views

Webpage sent me my password in clear text can it be secure? [duplicate]

I registered for a webpage years ago and have been using it without issues, today I made some changes to my account and they sent me an email containing my username and password in clear text. I ...
3
votes
1answer
61 views

What Information is Exposed When I Send A Message From My Mobile Device

When I send a text message and/or an email, with or without location services turned on, what information is available to the recipient of that message if they know how to read the data behind the ...
3
votes
1answer
241 views

3000 new contacts being added to gmail after receiving an email

Recently I realized that there are three thousand contacts with same name and email address in my Google contacts. The name belongs to an email that I have recently received and responded to, nothing ...
3
votes
2answers
214 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 ...
3
votes
1answer
138 views

Is BSI’s process good? (Informing email address owners that their address/password (of unknown/different accounts) was stolen)

The German BSI (Federal Office for Information Security) claims to have got a list of 18 million email addresses and passwords – supposed to be the result of identity theft. They allow to check if ...
2
votes
3answers
668 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
5answers
952 views

How can a non-technical user verify a message was sent “securely”? …or over TLS?

I have a situation where B2B and B2C communication needs to be sent securely and not visible to most SMTP hijackers. I don't care about conspiracy theories or NSA style attacks, but want to provide ...
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 ...
2
votes
2answers
463 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 ...
2
votes
3answers
6k 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. ...
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 ...
2
votes
3answers
448 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
5answers
1k views

How are ProtonMail keys distributed?

There is a service called ProtonMail. It encrypts email on the client side, stores encrypted message on their servers, and then the recipient decrypts it, also on the client side and the system ...
2
votes
2answers
252 views

E-mail already in use exploit

I have a registration portal where user inputs his details and then a valid email account. Currently I check the email is not used already and if it is I reply with the classic: "email already in ...
2
votes
3answers
1k views

Will SHA1 of Email Addresses Always be Unique?

We want to store data about a person without storing their email address, but we want to latter connect that person with their data upon them supplying their email address. Storing a SHA1 of their ...
2
votes
3answers
2k views

Email security and Home Mail Servers

Suppose you're truly paranoid (I assume the majority here identify with this?) and you don't want Google or other email service providers reading your email (to serve ads, etc). You don't want your ...
2
votes
4answers
156 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
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 ...
2
votes
4answers
118 views

safe way to communicate IBAN connection

how do I securely communicate my bank connection details (IBAN + full name) to an otherwise trusted person with email being the only connection? Obviously I wouldn't use (plaintext) e-mail since any ...
2
votes
2answers
145 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 ...
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
1answer
308 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
3answers
53 views

VPS Privacy: OpenVZ vs KVM vs Xen

Considering OpenVZ, KVM and Xen: Which VM technology is the most difficult for the host's administrators to access given an encrypted root partition? Can I have a reasonable expectation that rogue ...
2
votes
2answers
97 views

How to find out the email host of a vanity email address?

Assuming a person gets his own domain address, say, theperson.com. He then goes on to create a vanity email address with that domain. e.g. me@theperson.com. me@theperson.com may be hosted by the ...
2
votes
1answer
772 views

The security of sending emails with SPF/DKIM, but not signed

We're using an email sending service (fairly known) to send our emails. We made DNS changes so that emails going through them would pass SPF and DKIM. A few days ago we noticed that they allow any ...
2
votes
4answers
1k views

Yahoo Email Keeps Getting Phished

I keep getting spam emails from myself (and I am sending them to others as well) on my Yahoo Mail account. I have already went through two password changes which I thought were secure. My very last ...
2
votes
1answer
265 views

Email Compromised due to Yahoo Mail Exploit

On Monday due to XSS vulnerability present in the Yahoo mail my email has been compromised. I have immediately changed my password but i am not sure is this enough i.e. do i need to delete my cookies ...
2
votes
2answers
276 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?
2
votes
3answers
178 views

Girlfriend just sent Personal info over email

My GF just hit me up and told me she just sent some of her personal info over an email. She was trying to send her folks some documents.I guess the documents had some sensitive info on them Like her ...
2
votes
2answers
11k views

Spam that comes from names in my address book, but not their email addresses

I've recently received two spam messages that show a possibly worrying degree of knowledge about my contacts, and I'm wondering how concerned I should be. Specifically, the names -- but not the email ...
2
votes
1answer
679 views

How to determine source of e-mail and verify if the source is/could be legitimate?

I got an e-mail (in my spam folder) from usercenter@idcenter.uc.cn which asks me to click a link to validate my login for their website. Obviously, I deleted this e-mail without clicking it's link. ...
2
votes
3answers
720 views

Is it possible to block emails (to all email accounts) that contain certain word/phrase patterns?

I'm not sure if this is the most appropriate SE group to ask this question but I'm hopeful that it will get some interesting and helpful input from the folks here before it is possibly moved. A ...
2
votes
3answers
241 views

PCI Compliance Problem

My company is trying to become fully PCI Compliant and we are switching our outdated systems to use Authorize.net CIM among other things. But, currently we're all over the place and until our new ...
2
votes
2answers
165 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 ...
2
votes
2answers
100 views

Does SMIME differ from TLS, PGP, DMARC signature, or a Portal Encrypted email message in terms of legal non-repudiation?

I'm interested in protecting email messages from NSA-style snooping, but don't want to incur additional legal risk in doing so. In other words, does SMIME encryption and/or signing cause a given ...
2
votes
1answer
56 views

Which information does a whois lookup reveal about the registrant of the domain?

A friend of mine recently got her Gmail account "hacked" because of a weak password (the same as her login..). While sanitizing her account, I removed the forwarding of her emails to one email ...
2
votes
1answer
128 views

How can I prove to a third party that I'm sending the emails I'm supposed to?

Suppose one of my duties for a small organization is to send out statements to clients by email. Suppose one of the directors / owners / trustees want to be able to audit the numbers. Specifically he ...
2
votes
1answer
81 views

Layered email encryption with multiple private keys on separate media

I'd like to encrypt e-mail messages so that multiple physically separated keys are needed to decrypt them. For example, I'd like to have three private keys stored on different media, as in: key A ...
2
votes
1answer
261 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
205 views

Securely notify users about account changes

I am developing a web application (using PHP) and I am wondering what the best way is to notify users that someone updated their account information? The information that can be updated includes: ...
2
votes
1answer
600 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
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 ...
2
votes
1answer
234 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 ...
2
votes
1answer
77 views

Where do I report a friend's email account that has been hacked?

I just received an email from a friend's email account that conforms with the standard hoax where the person says they are traveling, have been robbed, and need money to pay for the hotel bill to get ...
2
votes
1answer
89 views

Analyzing a suspicious email

Today I received a very suspicious email on my gmail account. When I analyzed the content of the message, this is what essentially made up the message. <center> <a alt="" ...
2
votes
1answer
125 views

Should my company have an SSL on our email

We have a new IT guy that insists we do not need an SSL on our email. Quite a few people access their email from outside our office(network) via mobiles and home computers, often from WIFI ...