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

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1answer
9 views

How safe is it to use shared SPF record domains?

I'm wondering the following, what if shared SPF records like below are used? "v=spf1 include:_spf.google.com ~all" "v=spf1 include:spf.mandrillapp.com ~all" "v=spf1 include:servers.mcsv.net ~all" ...
-4
votes
2answers
34 views

Is it possible that the person I write to will see the email before I write to him?

Is it possible that the person I write to will see the email's content before I reply to him? If I got an email and I answering that email, is there any feature that can cause my reply to be seen by ...
1
vote
1answer
25 views

DMZ and Mail servers

I've seen a few DMZ related questions here in the past, but wanted to ask one directly related to email. I've done some research on this, but wanted to ask the forums opinion. I know it's best ...
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votes
0answers
30 views

Can't encrypt email

My friend has a problem described here: https://gpgtools.tenderapp.com/discussions/problems/18790-cannot-encrypt-an-email But the solution provided by this link did not work. What else can he try? ...
35
votes
6answers
4k views

Unsubscribe safely

I have heard that is better to never click to any link in an email. Is it a bad idea to click to a unsubscribe link? What is the best way to unsubscribe to undesired mails?
1
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4answers
79 views

is it easier to eavesdrop on ethernet connection rather than wifi?

I heard someone say that ethernet connection is vulerable if someone can connect to your LAN, and that the traffic isn't encrypted in the way it might be if you're using WPA wifi encryption. Is this ...
2
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3answers
123 views

Email confirmation techniques in major sites

The way I understood traditionally for email confirmations to work is the user registers to the site with their email and then to login they must verify their email. If they have not verified ...
-4
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1answer
60 views

How block SPAM effectively? [on hold]

There is a spammer wrecking havoc in my company. The SPAM emails is not created by any automatic means, but by someone who changes his email every so often after we block him by email address. Any ...
-2
votes
2answers
42 views

What IP address is a new email account associated with? [on hold]

If records are subpoenaed from google will they reveal internal IP or external IP addresses of a email account? For example if an email address is made and an email is sent using and iPad and home ...
5
votes
2answers
146 views

Potential employer wants me to email my SSN with an application form, is this a major security risk?

I'm job hunting at the moment and I've come across several potential employers that have PDF's that you would download, fill in, and then email to them. I feel EXTREMELY uncomfortable sending my ...
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votes
0answers
38 views

How to track down a email [on hold]

I'm wondering how I track down a email. I have tried bananatag but I would like something more advanced. I have been scammed and want to get their IP. I also have a web server that I could trick ...
2
votes
4answers
62 views

What are some ways to spot email spoof attacks?

I use Gmail and I started getting malicious-sounding emails from people I know intimately. The people I spoke to said they did not send those emails. In order for the attacker to carry this off, are ...
1
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1answer
69 views

How to determine if mail was encrypted during transport using the header information?

First things first: I know about the difference between end-to-end-encryption and transport encryption. Back to topic: I already read some things about how mail server handle transport encryption, ...
-4
votes
1answer
98 views

What encryption is used in this email? [closed]

bobnick1998sw@yopmail.com 96Xx7Tfrf+2zLvKiSXLAoY+W4dh6h+r4ML3JlmXrkyQ= bobnick1998sw1@gmail.com 888IK6Jz5tLP11RcEfWB/CcSbq4x7FIX2BtRi15o7dc= Here are the emails and the encrypted emails, now can ...
2
votes
1answer
63 views

How to send an encrypted mail only knowing the PGP fingerprint?

How does one send an encrypted email with PGP, when he only has the recipient's fingerprint? I am already sending emails using PGP, but I've just pulled a contact's PGP fingerprint who I need to ...
0
votes
2answers
103 views

Authenticating Hotmail's certificate and connection security

I've recently received the following error message from hotmail.com (or live.com) after I have logged in using Chrome browser, consistent using different accounts and computers (regardless of 2FA or ...
0
votes
2answers
23 views

Is there a way to attack STARTTLS + certificate pinning probed from multiple places?

I just had this discussion on IRC and I have to admit I did not understand why other users were not convinced this would be enough... Let's say I would like to protect e-mails sent out from my ...
1
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2answers
35 views

Is there a online filter to check email attachments?

I've just received an email from an old employer. There is very little information in the message sent just: See attached file for your review. Kind regards, Mick with an attachment. I ...
-2
votes
2answers
48 views

Are these statements correct [closed]

Are the following three statements more or less correct: -To send someone an encrypted email basically entails having access to their public key (either smime or pgp). Thus for all practical ...
0
votes
0answers
31 views

Update certificate in Outlook contacts [migrated]

How can I update an encryption security in Outlook contacts? I got an email signed with an updated certificate by someone who is already in my contacts with an expired certificate. If I REPLY to ...
2
votes
2answers
77 views

Hijacked Aol Email Account - Lack of security?

First, I'm very sorry if this is not the place I should ask this, but it seems to be the best choice. My Aol email account was hijacked during the night two days ago : the password has been changed ...
1
vote
3answers
75 views

Any Security Risks for using mailto:?

I use a PHP script which performs a database search and when no result are found, user is presented with a mailto link with this format mailto:example@test.com?subject=SEARCHED_QUERY_HERE The ...
0
votes
2answers
77 views

Is this a case of simple email spoofing or has my email account been compromised?

I just arrived home and when got to my computer I checked my mail box and it was with a message coming from my own email address that was sent almost at the same time I got home. I promptly ...
1
vote
1answer
50 views

mis-use of email address to obtain services from Groupon [closed]

I recently bought a new domain name "familyname.net" and I redirect emails to this domain to my normal email address. Recently I received various emails, one of which came from Groupon to confirm the ...
3
votes
4answers
181 views

How to detect self destructing emails? How to prevent from self destruction?

Recently I came across a gmail extension for Chrome browsers which claims to send self destructive emails. I tested by sending self destructive emails to my email account and it works fine Now my ...
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votes
4answers
127 views

What mail applications use crypto?

I just read that everyone in the world can ready my mails (if intercepted in traffic by eavesdropping?). Also, it reads that current versions (book's from 2004 so I assume that new versions adopt ...
0
votes
4answers
308 views

Is end to end email encryption possible without unique domain/subdomain for each user?

Lets say Alice@gmail.com wants to send message to Bob@secureMail.com Alice <--> gmail.com <--> secureMail.com <--> Bob We know gmail.com can read the unencrypted message. Is it possible for ...
4
votes
2answers
116 views

Is using a self signed certificate safer than a free ssl certificate? [duplicate]

I have a personal website/email server, basically for my own self learning use. I am using CACert (http://www.cacert.org/) for my SSL certificate as advised in a tutorial. I have no clue about ...
2
votes
4answers
95 views

How can I stop an IP from trying to use my mail server?

I have recently set up my first email server, and I look at the logs in /var/logs/mail.log to see what is happening, I notice this one IP does this multiple times every day for the last so many weeks ...
2
votes
1answer
134 views

Exploiting mailto links

Supposing that the user has the power to include any content after mailto: snippet, are there any possible security vulnerabilities? Example: The user says their email address is foo. The link on ...
6
votes
3answers
466 views

Is there any security reason that mail services like gmail or yahoomail limit the size of file attachment?

Despite the fact that Email standards such as MIME don't specify any file size limits, but in practice email users will find that they can't send very large files(more than 20 or 25 MB). Some experts ...
2
votes
1answer
105 views

What is the best setup to keep my email private from both attackers and government agencies?

I am attempting to setup a secure and private email account for my company. we currently use gmail which actually requests the emails from a hosting service provider that is configured with our ...
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0answers
26 views

Use DANE to authentify mail sender

Background: I have my own virtual DNS infrastructure, from the root to the mail server mail.example.com. Everything is signed using DNSSEC. client1@example.com can send email to client2@example.com, ...
0
votes
1answer
37 views

Is secure tokens send by email secure? [duplicate]

I'm struggling with the reset password function of a web app, the way i'm inclined to do it is by sending a token based url to the email of the user and than the user can access and reset its ...
0
votes
1answer
54 views

Opening mail without any risk [closed]

Before opening unknown email (not in spam folder) how we can identify no any danger inside the mail (with availability of active virus guard)
8
votes
3answers
555 views

Does OpenPGP encryption mean that not even I can see my data?

Say I have an email and I want to send it to someone else. I encrypt it with his public key. This ensures that only he can read my message. Does this also means that I won't be able to read it? If so, ...
1
vote
1answer
79 views

How is the username and password captured on this mobile device?

I have a Motorola phone, and I am concerned about my privacy after reading this article : http://www.beneaththewaves.net/Projects/Motorola_Is_Listening.html The poster says: For both of these ...
1
vote
1answer
84 views

Android email encryption [closed]

Is there a reliable (in terms of security), open-source application for handling (send/receive + en-/decrypt) encrypted emails on Android? Something like TextSecure for emails. I just found a command ...
0
votes
2answers
77 views

How can I stop an account I don't control from sending spam email in my name to my contacts?

Recently I received an email from a friend with "My" email to them attached. The email "I" sent them was obviously spam, one of those "You have to see this..." emails. The email had been sent to ...
2
votes
1answer
109 views

How does this encrypted webmails works?

In the last days I was looking on Tutanota, ProtonMail, LavaBoom, and others webmails that promise to respect users privacy. For all those, the one I most liked was Tutanota. I did few tests with ...
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votes
2answers
88 views

Can free email provider's partners and affiliates read your emails? [closed]

I read that if you use free email, these entities have access to your very personal info!: "Your email provider company itself, like Google Their partners and affiliates Your ISP Various ...
1
vote
1answer
77 views

Email phishing scam asking customers for card details

I work for a small ecommerce company and over the weekend we received a few emails from customers claiming to have received an email asking them to confirm their card details to process their orders. ...
4
votes
2answers
133 views

Is it possible and does it make sense to sign an E-mail with PGP and S/MIME?

After some research without any answer to my question, if it's possible and does it make sense to sign an E-mail with PGP and s/mime (?), I'm hoping to get an answer here. I know that, PGP and S/MIME ...
1
vote
1answer
75 views

Short Lived Email account for VPN signup [closed]

I'm curious about how the process of signing up for a VPN service with a short lived 'disposable' email address would work. Firstly, what benefit (if any) is there to creating the account ...
2
votes
1answer
80 views

Reading encrypted data before sent to remote server

I'm developing a mobile app (Android only for now) to provide a disposable e-mail service to users. Users will be given temporary e-mail addresses so they can receive and read e-mails for a certain ...
1
vote
2answers
59 views

Are there any anti-virus programs that have a bot that clicks email links? [closed]

Just started a new job, and it looks like we have some bots that are clicking every link in some % of e-mails. The problem is, I can verify that at least a few of these people are real. The only ...
7
votes
2answers
57 views

Does Outlook “trusted domain” actually do any sort of checking?

When you receive an email containing pictures from a new domain in Outlook you can right-click on the address and "Mark this domain as trusted" which will autoload all the photos on future emails. ...
7
votes
2answers
353 views

ProtonMail security concerns

This TED talk brought me here. First of all, to those who created ProtonMail: Nice job!!. Regardless of what people say, it's definitely a big step forward from tradition options like Hotmail, Gmail ...
0
votes
1answer
151 views

How do I convert a GPG certificate to a CRT certificate that can be imported into Windows Certificate Manager?

I have a GPG certificate from someone used for email -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG/MacGPG2 v2.0.14 (Darwin) I would like to import that into Windows Certificate Manager So ...
1
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0answers
102 views

Accessing the Exchange EWS API with safety in mind

I'm new to the security stack exchange, so feel free to edit the question or redirect me to another forum if this is not fitting. I'm currently working on a web application that will allow the user ...