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

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0
votes
0answers
63 views

Why is my website getting spammed?

Does anyone recognize this type of spam? NAME: Bagas EMAIL: dq95zxm7l@gmail.com PHONE: JCBUIR6ulwtO COMMENTS: I must express apaotcipeirn to the writer for bailing me out of this particular ...
2
votes
2answers
47 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 ...
42
votes
6answers
7k views

Why do security experts like Snowden use email services like Lavabit and Hushmail rather than self-hosted email?

Why would anyone like Edward Snowden rely on 3rd party services like Lavabit or Hushmail to host his email? I mean it's very easy to set up a self-hosted email server. What you need: Rent VPS (even ...
10
votes
5answers
11k 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?
3
votes
1answer
97 views

How was my email intercepted? [on hold]

I've recently sent an email to a non-Protonmail user, using a code phrase. Someone on the recipient's home network was able to intercept the email and responded to me in detail as to the content of my ...
4
votes
2answers
80 views

Reset links in password expiration emails

Our organization is rolling out yearly password expiration to our 40,000+ users this fall and we have been socializing this change for some time now. However being such a large organization, our users ...
3
votes
1answer
26 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 Can it ...
63
votes
8answers
7k 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?
-6
votes
2answers
70 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
4answers
88 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 ...
-3
votes
0answers
33 views

Can't encrypt email [closed]

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? ...
1
vote
1answer
59 views

Is thread's auto-login from email implementation secure/good user experience?

As far as I can tell thread.com log their users in automatically based on a token in their emails, appended to the URL. e.g https://www.thread.com/1234logmeintomyaccount-forexample This is a really ...
2
votes
4answers
66 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 ...
-4
votes
1answer
65 views

How block SPAM effectively? [closed]

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
3answers
140 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 ...
7
votes
2answers
365 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 ...
-2
votes
2answers
46 views

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

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
161 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 ...
-4
votes
0answers
40 views

How to track down a email [closed]

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 ...
4
votes
2answers
3k 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
3answers
405 views

Would Axolotl Ratchet protocol be suitable for encrypting email communication?

Axolotl Ratchet is used by Textsecure and is an enhanced version of OTR in a way to make it suitable for mobile applications, which has the probability to encrypt messages without both parties to have ...
1
vote
1answer
72 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, ...
8
votes
2answers
1k views

Can a firewall tamper with email attachments?

I am using Thunderbird as an email client for managing my different email accounts. Yesterday my friend sent me an email with a PDF attachment. Today when I tried to open the attachment I get the ...
2
votes
1answer
67 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 ...
3
votes
3answers
494 views

Sending an encrypted PGP email to someone who doesn't yet have my public key

Suppose I have the public key of a recipient I'd like to send an email to, and I've never sent this person an email before. Does it make sense to encrypt my first email to this recipient and also ...
4
votes
5answers
849 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 ...
0
votes
2answers
107 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 ...
2
votes
1answer
51 views

Possible for Lync (Skype for Business) to adopt Activesync-style policies?

My compliance manager recently told me that Lync IMs should be treated as e-mail for compliance purposes. This also made me realize that our other email policies (encrypted device, pin required, ...
0
votes
2answers
24 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 ...
6
votes
2answers
1k 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?
2
votes
1answer
81 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 ...
7
votes
4answers
5k views

How can hackers guess passwords (using dictionary attack or brute force) without being locked out?

Nowadays almost every website you want to register in; is asking you to create a complicated password...But why cant we use simple passwords? I am just wondering because in case of multiple wrong ...
1
vote
2answers
36 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
79 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
79 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 ...
3
votes
4answers
243 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 ...
1
vote
1answer
51 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 ...
-1
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
309 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 ...
6
votes
3answers
475 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 ...
4
votes
2answers
119 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
99 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 ...
5
votes
5answers
3k views

Alternatives to sending out passwords in plain text via e-mail?

One of my hosting providers is sending a new password in plain text per e-mail, on request. How insecure is this practice? What would be a good (more secure) alternative to this?
2
votes
1answer
136 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 ...
3
votes
4answers
2k views

CAPTCHA or email confirmation?

I have read that captcha isn't a perfect solution to protect a website where for example the user can create an account, since there are many people in different countries that practicallty read ...
2
votes
1answer
115 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 ...
1
vote
0answers
27 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, ...