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

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3
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1answer
184 views

How can an email from a Yahoo address be sent through Yahoo without authentication?

I received this bounced email, yet I have a password with 105 bits entropy, my sign in history only shows local sign ins, I do not have any linked accounts nor apps, and I have not been to ...
2
votes
1answer
48 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 ...
2
votes
1answer
101 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 ...
0
votes
1answer
138 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 ...
3
votes
0answers
83 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
0answers
50 views

Creating New Acc in Mac Mail 1st Connect to Server not SSL is uname & pw tx secure?

It appears that whenever you set up a new mail account on Mac Mail on OS X (or iPhone, iPad etc), that as soon as you enter the server and the mail account user name and password, Mac Apple-Mail tries ...
1
vote
0answers
123 views

PGP-encrypted Email or SSL/TLS Webform for Responsible Disclosure Communication?

So it's a fairly simple question. When offering an avenue to security researchers for communication with us regarding disclosure of security vulnerabilities, what's the best way to do so? Assume we ...
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0answers
61 views

Is winmail.dat a malware propagation vector?

Some of my coworkers use Microsoft Outlook (I believe) and have it configured in such a way that mail attachments are encapsulated in winmail.dat files. Apart from the general annoyance and lack of ...
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0answers
30 views

How to manage security for multiple PC and VM?

I have a firewall VM which creates I have used to setup subnet for different purposes. For example: (fake ips, of course) 1.1.2.1/24 DMZ 1.1.3.1/24 Internal 1.1.5.1/24 security/logging I use ...