Why am I receiving emails from email@example.com?
Some months ago, I started to receive some emails from "Mail Delivery Subsystem" (firstname.lastname@example.org). Despite this being an "automatic" failure email, I thought these emails were spam, so I just ignored them. But today I received many more emails, and this started to disturb me.
These emails are sent from email@example.com (there is an icon that indicates a reply email) and says that "MYEMAIL@aol.com couldn't be found". "MYEMAIL" is the email that is receiving these messages, but with domain "aol.com" (I don't have any email from this domain).
In these emails, there is always an attached file about something attractive, like diets and wines. I think the most curious detail is that I was receiving these emails but in a "normal way". Before receiving mailer-daemon, I was receiving spam like normal, even with the same subject, and at some point this changed to mailer-daemon. Another detail is despite these emails always having an attached file, I can't see the attached file icon until I open the email. Only then, when I close the email, I can see the attached file icon. Obviously I never downloaded these files
I already changed my password, checked login's entries and everything seems to be normal. I can just block emails from firstname.lastname@example.org, but I'm concerned about why this is happening
Regarding the email id - mailer-daemon@googlemail -
I've had this issue before, with another email provider. In my case, someone was able to obtain my e-mail address, but not my password. Then, my email address was used as the "reply-to" or the "sent-from" address on a spam email. It is annoying, but your email itself is probably safe. (TFA helps).
Example for clarity:
Through whatever means, I notice that a valid e-mail address is Mycroft@googlemail.com.
Now, I can authenticate to another mail server, say postoffice.com. I can then use a sendmail program that does something like this:
Subject: Best Diet Program Ever!!
Body: blah, blah, blah.
For more info, click here!
You will then get the mailer-daemon message, and I have not compromised your email, but I have compromised your email ADDRESS.