Spam Mail Related to my Browsing

I was searching google to find a good printer to buy. To my horror, the next day I got a spam mail with theme "Print smarter at low price". Is this a coincidence or is my PC breached? What should I do? No alerts from Anti-Virus. Or can that webpage I opened install some malware? I didn’t click on anything there.

Was I hacked? Does the Apple Mail App on Desktop trigger a Google “signed-in device”?

Several of my personal accounts were hacked by my former employer (files were altered). I confronted them, mentioned the platforms but only sent them evidence of my Google account being hacked knowing that they might try to sweep it under the rug.

They conducted an “internal investigation” and concluded that the Apple Mail on my work device triggered those sign-ins. Besides the fact that their explanation doesn’t explain why my other accounts were hacked, I tested their theory and couldn’t replicate it. I looked it up and some people said that pull requests from Apple Mail don’t trigger logins. Can anyone confirm?

In addition, I did more digging and downloaded my Facebook data and this is what I found. It shows everything including the browser used, which a third-party app is not.

The hacks coincide with both a complaint I submitted to IT about their questionable practices and false allegations (made by IT a week after my complaint) that led to my dismissal.

550 Please turn on SMTP Authentication in your mail client. server without authentication

I got this message on my Gmail when i sent to my zoho prefessional mail i check all MX , CNAME

Everything is alright, it work perfectly on my web form , but not on gmail when sending an email to my Zoho mail.

On my Track EMail Delivery : Rejected relay attempt:………

Can someone have this problem before help ?

Why certain sites don’t send newsletters to “anonymous” mail addresses?

I use an “anonymous” mail address ( provider in my case). I have found that mainstream news sites in particular don’t send their newsletters to such an addresses. It looks like the domains blacklisted.

What is the reason? I can understand that they don’t want you writing comments from anonymous mail addresses, but passive reading of a newsletter is also prohibited?

Why this behavior? Why this behavior only with traditional mainstream news?

These newsletters usually have a lot of advertising and tracking, why they don’t wish to deliver them to “anonymous” addresses?

Verifying S/MIME mail with openssl

I’m trying to verify an S/MIME signed email with openssl (term tooling) but I’m having a problem. I have the mail and I can extract the chain of certificates but I’m failing at locating the actual signature of the email. I have the public key of the signer (the last certificate) and I have the plaintext, which I got with

openssl smime -verify -in <mail> -noverify -out mail_body.txt 

If I understand correctly now I need the signature, decrypt it with the last certifier public key and check that with the hash of mail_body.txt but I can’t find the signature.

Risk in adding shared mail server to my SPF like sendinblue/sendgrid for mail reputation?

My enterprise would like to make some mass mailing to their customers, using a third party solution (e.g.: sendinblue, sendgrid, mailchimp…).

Is there a real risk that my domain mail address could be considered as spam if the shared IP is badly used by one of the shared service’s evil customers (e.g., for spamming, even just for a week)?

In the worst case, would every mail sent under this enterprise domain name be considered by the security solutions as some spam (iron point, proofpoint…) and blocked?

In such scenario, how long it could take to be back a good mail reputation?

Yahoo! Mail logging in with 2FA code only

I came across a serious issue with Yahoo! Mail that I hope someone would help to fix or raise awareness for.

I wanted to create an account on Yahoo! Mail. I entered my phone number to the Yahoo! login, and it asked me if I wanted to receive an access key. So I did that, and typed in the access key… Surprise, I logged in ACCIDENTALLY to the Yahoo! Mail of the previous owner of my current phone number! Someone had used the same phone number years ago and connected it to his Yahoo! mail, and once he stopped using the phone number it eventually was bought by me, and I used this phone number to gain access to his email! Yahoo! didn’t even ask me for a name or email, just access to the phone number, and I was able to access his email. I immediately logged out.

Is this a normal thing? Looks like a very serious privacy issue… and Yahoo! could fix it just by requiring the person to enter the full name or email.

High bounce rate due to attacker is using website’s mail system

We got a realatively high bounce rate today, because someone decided to spread some links using our mail server. The implementation looked like this: He used the registration form and planted a link in the firstname field, which appears in the email’s first line. Then he sent out like 1200 emails like this. And my question is what can we do to prevent this? We can use captcha for sure, but can we do more about it?