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

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2
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3answers
55 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 ...
4
votes
5answers
214 views

Secure file sharing, instead of attaching files to emails?

Allow me to give some background information, so you may understand my situation better. We have been prone to sending emails to unintended recipients, many of which contained confidential data. ...
6
votes
4answers
137 views

Exchange 2013 blocks txt file attachments - are there security reasons?

My Exchange Admin is setting up 2013, and it is set to block txt file attachments specifically (as well as others). I have tried searching for risks associated with txt attachments but could not ...
15
votes
4answers
2k views

Is this “Domain Registration Service” email a scam?

I received an email to the email address listed on our website (it's a generic info@ourcompany.com to help "weed out" spam, whereas each employee has something like andreas@ourcompany.com to which I ...
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 ...
0
votes
0answers
70 views

Can not open my yahoo email. The connection was interrupted [closed]

Since yesterday, I can not open my yahoo mail. I get connection interrupted message (see pic). Or, some times I get another similar message saying the connection was reset. I tried another PC, same ...
3
votes
2answers
133 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
3answers
321 views

Shared hosting mail server, Thunderbird and encryption

In spite of much searching on the internet, I can't really get an adequate understanding of this topic, perhaps because it combines multiple elements. As a result, I'm really worried about the state ...
4
votes
1answer
155 views

Fake email messages via List-Unsubscribe header

List-Unsubscribe email header makes it possible to recipient to automatically unsubscribe from the mailing list: List-Unsubscribe: <mailto:list@host.com?subject=unsubscribe&body=qwe> Free ...
1
vote
2answers
84 views

Getting Loads of Emails 'linking' my account to Gmail accounts I know nothing about

I have just come out of hospital and have in the region of 30 e-mails from gmail over the past few days 'linking' a gmail account to my (hotmail) email address. I have not done this once never mind ...
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 ...
31
votes
2answers
2k views

Why does PGP work with the CC field in e-mails?

I was wondering how PGP works with a CC. In my understanding, if I send an e-mail to foo@example.com and use baz@example.org in the CC, Enigmail would have to encrypt the e-mail once for every user ...
1
vote
1answer
74 views

How do web email clients store my passwords from other providers?

The situation comes down to this: When I enter in hotmail, it retrieves my messages connecting to other providers: they could only do so by using my email and password. Since I had signed in a ...
2
votes
3answers
179 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
1answer
584 views

How could someone create a Facebook account with my email address without stealing it?

Someone with the same name as my sister seems to have inadvertently created a Facebook account with her email address. The funny thing is that this person doesn't seem to have ever accessed my ...
0
votes
0answers
51 views

How to secure Outlook [Resolved]

I was curious on some best practices for securing Outlook against hackers. The data transmitted between the email server and client are almost always encrypted these days but I haven't seen a great ...
0
votes
1answer
199 views

How do I determine S/MIME encryption used?

From what I understand it seems that S/MIME uses PKCS #7 which can handle various different types of encryption. How is the choice of encryption method made by the e-mail client and how do I know what ...
13
votes
2answers
3k 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 ...
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 ...
3
votes
1answer
78 views

Why shouldn't I sign my email newsletter using an s/mime email certificate?

I currently offer email subscriptions on my blog, something I coded myself in PHP. People sign up on the blog using their email address. I send them an email with a link to verify their email address ...
1
vote
2answers
97 views

My certificate seems fine but my TLS fails (Cert not validated)

I set up my certificate for my mail server at https://mail.travelstreamer.com/ I exported my certificate as described in my mail servers documentation and pointed to it in the server settings. The ...
10
votes
6answers
2k views

How do I safely inspect a suspicious email attachment?

I received a pretty blatantly spammy email to my Gmail account. I'm not really sure how it made it through the spam filters, since it has all of the telltale signs. The FROM field is spoofed as ...
0
votes
1answer
98 views

How do botnets deliver spam? [closed]

I can't seem to find the answer to this question. I read that botnet bots are used as email relays (they have smtp servers installed). Wikipedia on Open mail relay: "(...)Internet initiatives to ...
1
vote
3answers
45 views

Simplifying SMIME by re-using the Public & Private key across email accounts

I need to simplify (at the cost of security features) an SMIME deployment. How can I generate a CSR that reuses the same public and private key for more than one email address? In other words, I ...
2
votes
2answers
113 views

Is my PC safe? need help

About 6 days ago my parents who aren't great with PCs got phished on gmail, and the account started spreading spam. It had been hacked on an Argentinian IP, and then logged in from IMAP and SMTP from ...
3
votes
3answers
3k views

Email hacking myth

I never believed that some one can actually hack an email that easy. If someone hacks an email it means he actually hacked the server and he will gain access to many emails not to mine only. Anyway ...
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 ...
149
votes
3answers
18k views

Don't understand how my mum's Gmail account was hacked

My mum (on Gmail, using Chrome) received an email from a friend's Hotmail address. She opened the email (very obviously a phishing email) and clicked a link in it. This opened a webpage with loads of ...
0
votes
3answers
57 views

What is the technical rationale behind intermediary email servers?

EFF's Survelliance Self-Defense (SSD) project has an illustration of how email over SMTP goes through intermediate mail exchange servers: AFAIK each intermediate servers is expected to add its own ...
0
votes
2answers
285 views

Automated software hackers use to try passwords

Because of the eBay hacking, I had to go and look for other accounts that I have used the same password to change the passwords on those site as well. (I know that it's very bad to have same passwords ...
2
votes
2answers
160 views

How to sniff email with https on Windows? [closed]

I am working now on Windows 7 and I want to see if I can sniff an email content on it with Wireshark. So all right with http but with https I can't at this moment and I don't understand how. You ...
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 ...
0
votes
2answers
82 views

PayPal phishing attempt?

[This is a "soft" question and as such I'm not sure it's appropriate for this site. However, it does involve information security.] I have an email address, me@gmail.com that is not associated with ...
5
votes
2answers
950 views

Can someone know my IP address through Thunderbird email attachments?

Can someone know my IP address through Thunderbird email attachments? Can a cunning attacker manage to find my IP address through attachment 'images' in emails that I unsuspectingly open?
0
votes
2answers
63 views

What kind of information can be found from email?

When an average person sees an email, he can see only part of an information enclosed in the mail. To see full information one can look at the source of an email, which shows more. Example of an email ...
5
votes
5answers
2k views

Can the recipient of my emails know my IP address?

When I send out emails using gmail, is my IP address being recorded? can the recipient of my gmail message knows my IP address and thus infer where I am located?
1
vote
4answers
110 views

HTML Entities to hide Email Addresses

I'm on WordPress trying to keep spambots from grabbing email addresses that may be in The Content. WordPress has a nifty little function simply called antispambot() which will convert the email ...
1
vote
2answers
37 views

What is the proper terminology for the various SMTP tunnel encryption solutions?

I'm writing up documentation and want to ensure that I'm using proper terminology. 1) What is the proper technical term for the SMTP tunnel encryption standard that typically starts on TCP/25, ...
3
votes
3answers
92 views

How to check that an e-mail service provides encryption between the mail servers?

How can I technically verify* that the e-mail I'm sending from Gmail to Yahoo is encrypted all the way from Gmail's servers to Yahoo's servers? I know that it's advised to have encryption between the ...
1
vote
2answers
60 views

Public e-mail Encryption Certificate

I'm quite new to this, so don't be too hard on me. I'm currently using the CipherMail MTA to generate e-mail encryption certificates. I created an own CA and public and private keys for our contact ...
0
votes
1answer
56 views

Security of starbucks gift card redemption feature

Someone sent me a Starbucks gift card. The email contained a redemption link, and that redemption link ended in a long secure hash, much like those on github secret gists. Clicking the redemption ...
0
votes
1answer
51 views

Gmail Voicemail Encryption

I want to listen to my voicemails in a secure but convenient fashion. I plan do this by having my PBX encrypt the voicemail using openssl aes 256 cbc with salt and a single static password. The ...
5
votes
4answers
172 views

How can I convince my customers not to send Credit Card data over email?

My wife and I run an online business. For a long time we would accept credit cards over our website, and cash or bank drafts in person. However, as time went on my wife picked up the Square to process ...
1
vote
4answers
150 views

Hashing Email Address and Contacting User

I am thinking about a log-in web service that would store a users username, password, and (optional) email address. If they forget their username or password, they can have their username and a ...
0
votes
0answers
12 views

Should an SMIME signing and encryption key have different expiration dates?

Assuming the client supports different keys, what is some rationale that should be considered for signing and encryption keys? For example, since the encryption key needs to be present on each device ...
18
votes
4answers
3k views

Is it a security concern that a shop I registered at obviously does not encrypt my password?

I was kind of shocked when I just received my confirmation mail from the shop where I just registered myself: they sent my username (which is my email address) and the password I typed in. The ...
0
votes
2answers
45 views

Is it secure to use email to add content to a website?

I have a website running a social network Buddypress. Users leave comments on other users "walls". What I would like to do is to allow users to reply to each other inside the email client, without ...
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 ...
0
votes
1answer
108 views

Is this email being sent directly to sender?

I am receiving odd emails from a health insurance plan contact. Is this going to an alternate address first? From Kelly Trace Tue Jun 17 05:44:13 2014 X-YMail-OSG: ...
0
votes
2answers
68 views

OWA + AD Lockout Policy: Quite the Mixture

Many organizations have webmail exposed to the world. These sites are often hooked up to AD for user authentication. Are there any specific security controls OWA (Outlook web app) has that would ...