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

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0
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1answer
34 views

Google mail - Paypal emails going directly to trash [closed]

Emails coming from paypal go directly to my trash, I noticed this today because i got a mail notification through OSx. However when i went to find the email it wasn't there. After some digging i ...
0
votes
1answer
72 views

How should I handle a spam account I don't control from sending spam emails with my username?

A family member contacted me yesterday saying their email has been hacked and that some other family members received spam emails from their account. For this example, lets say the hacked family ...
2
votes
1answer
98 views

Identify if a certain domain is using Office 365 or Google Mail

I have a list of e-mail domains that i wanted to confirm if they're using Office 365 or Google Mail for mail. Checking MX using Nslookup can do the job but I noted that a few companies will use an ...
17
votes
2answers
4k views

Does my PGP key really need to match the e-mail address for which I'll be using it?

In considering whether or not I want to join the big web o' trust and put my keys on a key server, I got to thinking about how it would affect my e-mail address' exposure. I generally try to keep my ...
1
vote
1answer
85 views

What's the minimal way of sharing your public PGP key in email signature?

What's the minimal (not the entire public key) and secure enough way of sharing your PGP key in an email signature?
3
votes
1answer
215 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 ...
12
votes
5answers
2k views

Hashcash, is this really used?

I just heard about this term, is it really used? The concept does not seem new, is it used and/or implemented in current technologies?
42
votes
5answers
6k views

Why is end-to-end encryption still not default in mails?

I am not a cryptographer. Maybe that is why I don't see the issues with integrating PGP into SMTP. In my head: Lea requests the server of Luke's domain jedi.com to tell her the public key of luke@...
3
votes
1answer
92 views

Can email services upload files from your computer without your permission/knowledge?

The company I work for is involved in security clearance work, and thus all company computers are monitored (files, screenshots, etc). I am routinely logged onto my company email service with my ...
2
votes
2answers
87 views

Can an email header can be used to verify the real sender? How?

Lets say you're the target an advanced phishing attack, meant to look like it came from Amazon.com. It shows @amazon.com in the sender field, but you're suspicious. You can call Amazon and find out, ...
3
votes
1answer
59 views

Login based on mail domain

I'm trying to make a system where the sign up would be allowed or denied based on the domain of the mail. So let's suppose that only people from company.com are allowed to sign up on that system. ...
16
votes
3answers
603 views

What email addresses are treated as trusted?

Windows Live recently suffered a security incident because they didn't realize that email addresses like administrator@live.fi are considered "trusted": some certificate authorities will consider ...
0
votes
1answer
144 views

Is it safe to be showing my WAN and LAN IPs in my email headers?

I don't know how to hide my LAN IP from my email recipients. My LAN IP shows up next to my WAN IP in my outgoing email headers (sent to my other accounts and viewed by me). I have not seen emails sent ...
0
votes
2answers
64 views

How does an email provider verify my custom domain name?

I'm new to this and I've read a tutorial on this page: http://www.melyssagriffin.com/use-gmail-custom-domain/ The author of the tutorial wrote about her experiences of setting up a custom domain name ...
-3
votes
1answer
112 views

Spam email sent to my contacts pretending to be me.

I just found out someone has been sending spam emails to my contacts. I first thought that my account was hacked, but the emails aren't coming from my account but from a weird email address (my name ...
14
votes
15answers
759 views

Sending password reset links in email

Nowadays, when everyone tries to be more secure then each other, when companies spend billions on information security, it seems a little bit odd that the password reset left behind, the place that, ...
2
votes
1answer
54 views

OpenVPN Client Id appearing in emails

I use OpenVPN to connect to a server. I just found that in a series of emails I sent and received to and from the same person the following line appeared after every message I sent: [cid:{a long ...
1
vote
1answer
55 views

Does putting in quarentine attachments with two dots increase security in Outlook 2010?

Outlook 2010 and antispam systems already forbid executable attachments. In this scenario, does putting attachments with two dots in quarentine increase security? Attackers used to use this technique ...
0
votes
3answers
473 views

Email from supposedly Apple (mycloud.ssl.com)

I got an email where it says that Apple recently failed to validate my payment information and therefore they need to ask me to complete a short verification process in order to verify my account. At ...
3
votes
1answer
584 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 ...
206
votes
15answers
10k views

Tracing the location of a mobile IP from an email

I'm a TV scriptwriter - and not hugely tech-savvy, so please bear with me... If the police have an email, sent by a suspect over a 3G or 4G network, could they use the IP address (since they know ...
3
votes
3answers
191 views

Sending sensitive infromation via self destructing link in an email

I need to come up with a simple way for people within the company to send out arbitrary sensitive information to arbitrary recipients. There is an equal chance that the sender and recipient will be ...
0
votes
0answers
49 views

Certificate not showing up for signing in Outlook

I have a new ECA certificate installed on my Windows 7 machine, but when I use Outlook it is not letting me change the signing certificate to the new certificate, but it does let me change the ...
14
votes
2answers
17k views

Is it possible to use S/MIME in the web client of Gmail?

I could not find any options in the web interface of Gmail. All I could find was a Firefox plugin to use S/MIME with Gmail, but it seems to be outdated.
2
votes
2answers
238 views

How to tell if an email is encrypted, or just corrupted?

Ran a recovery program (Kroll Ontrack) on a Windows 7 PC and recovered many, many emails. Almost all of them open in my Windows 10 mail client (and Thunderbird), except for a handful from this March. ...
-1
votes
1answer
553 views

SQLMAP --OS-SHELL error [closed]

root@kali:~# sqlmap -u http://www.a***********.com/info.php?id=2 --os-shell _ _ _| |_____ _ {1.0-dev-nongit-20150907} | -| . | | | .'| . | || |||||,| | || |_| http:/...
6
votes
5answers
3k views

Security of faxes vs emails

Background The other day a friend who works in healthcare asked me which method of communication was more secure, faxing or email. He qualified his question by saying that his office faxes patient ...
2
votes
1answer
51 views

Are there any standard practices for protecting against malicious links being entered in a public form?

A website I'm working on needs to have a form for any visitor to submit a request for information about a service. The user will not need to create an account, and contact details are just part of the ...
16
votes
3answers
11k views

Is email encryption, as claimed by ProtonMail, possible?

Is it possible to create a Web service that encrypts all messages, such that only the writer, and the person to whom the mail is sent, can read it? In other words, is the theory behind ProtonMail ...
2
votes
1answer
88 views

Can I trust Google Scripts on sites like Labnol?

For example, consider this script. It requires me to grant permission to my Gmail account, but I'm confused why this is necessary -- is it not myself who is running the script? Or is my data going ...
0
votes
1answer
97 views

Email sending out spam to many contacts

I'm asking on behalf of a friend. A few days ago, I received a email with his full name (with no subject), thought that's from him. But when I opened it, there was only an obvious spam link, and I ...
3
votes
1answer
100 views

Where can I find a feed of actual spam emails? [duplicate]

I am looking for a feed of e-mail spam messages. I searched for one but found nothing that I can use. Does anyone know a site or service that offers a feed of actual spam messgaes that are currently ...
8
votes
3answers
292 views

Is it enough to look at the sender's email address?

I use Gmail. When I receive an email, Gmail displays the sender's email address. So far I've always looked at this address when receiving sensitive mails, to avoid phishing. For example, I know by ...
1
vote
2answers
215 views

Is this a legitimate Microsoft email or is this a Phishing email and how can I tell?

I am a mobile application developer using Microsoft Azure with my MSDN subscription to develop my back-end of the application. Today I got the following email: So given my above background this ...
6
votes
1answer
886 views

Gmail lets me use my old password

My university's email works through Gmail and I can log on to it either through my uni's website or in Gmail. I recently changed my password and I use it to log in to the schools secure WiFi, school ...
3
votes
1answer
133 views

How to secure/cleanup my accounts after having an old email account breached

I have two email accounts. My main one that I created a few years ago and switched to, which has a very strong/unique password that is not written down or stored anywhere. It also has 2-factor auth ...
2
votes
3answers
147 views

Emailing debit card details to a guesthouse

I'm trying to arrange a holiday out to the Aran Islands, and the guesthouse emailed me back confirming that they do have a room available. But here is the catch: they want me to email my credit card ...
1
vote
1answer
97 views

How can I contract an email tracking service and be silent about it?

I use a customized e-mail and my web-master, who is also the domain owner, doesn't allow me to see the settings that the DNS provides. Some DNS services provide, beside domain name registration, ...
5
votes
1answer
3k views

Gmail may be hacked - bulk spam emails being sent FROM Google apps account

I have a Google Apps email (Gmail with my own domain) - let's call it John@example.com. 3 days ago many people in my address book were sent a spam email FROM my John@example.com account. When I ...
3
votes
1answer
283 views

Why does my SHA256 certificate get encrypted with 168 bit 3DES?

We use S/Mime certificates for internal emails within our company. The certificates signature algorithm are all SHA256RSA with a hash of SHA256. I have confirmed the public keys are RSA(2048bits). ...
0
votes
1answer
70 views

Avast attempts to connect to the Internet when I try to download email [closed]

The file AVAST (Software\Avast\AvastSvc.exe) tries to connect when I check my email. When I forbid access to the internet for AvastSvc.exe, I can't connect to POP3 & SMTP. I'm not sure where all ...
1
vote
0answers
40 views

What should I do when I find out some company user database I am listed in was leaked?

Today the antispam tool in the company I work for blocked several emails. It has been months since last time, so I took the time to analyze the quarantined messages. Since I almost never give my ...
4
votes
1answer
91 views

How secure is my system for a password reset?

I am using my custom Parse Server with Heroku which I am pretty sure (99%) that it is decently secure using things like oAuth2 and 1 way hashed passwords. The problem is I am trying to implement my ...
2
votes
0answers
37 views

Something phishy going on with email [duplicate]

I own my own domain. For a month or so I've been getting emails from addresses I don't know with "see attached image" or "find the attached invoice", with a zip/rar file attached. Of course, I ...
2
votes
1answer
392 views

How Risky is Paribus?

Paribus (https://paribus.co/) is a service that automatically gets money back for you if there's a price drop on a product you purchased. It seems to work by monitoring your email, to which you must ...
4
votes
0answers
160 views

Using your full name as your work email address? [closed]

Standard practice in the workplace appears to be using your full name as your email address. This presents some privacy concerns to me. Even though we all grew up being told it's advisable to use a ...
0
votes
2answers
2k views

How hard is it to hack into a webmail account with a strong 8 character password?

Assume the hacker starts with only your email address and he has high incentive to gain access. UPDATE: Also assume the password is unique (never used elsewhere) and it is NOT a guessable word like ...
2
votes
5answers
3k 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 ...
29
votes
5answers
3k views

Safe email validation

I have been using this RFC822-compliant regular expression for email validation. Pen testers on HackerOne have used the following horrendous email addresses which satisfy the regex: '/**/OR/**/1=1/**...
0
votes
2answers
59 views

Reducing the success ratio of email harvesting

Would / does the following work to hamper email harvesting by spammers ? Since spammers - among other things - do automated email harvesting by looking for email addresses in web pages, it follows ...