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Spam from own email address
This guide details email forging, spoofing, spamming appearing to originate from one's own email address.
Did my account send spam?
You may receive spam as if it was sent from your address. Rest assured: you, and only you, receive this spam with your own email address. Spam does not go with your email address to the addresses of your contacts. The integrity of your email account has not been questioned at any time.
To reduce the presence of these messages in your mailbox, check if your own email address is present in the whitelist of your antispam filter. If so, remove it from this list.
I'm getting bulk send errors
If you receive many error messages indicating the non-delivery of spam messages, again, these are not really messages sent from your account but messages that have pretended to come from your address. Indeed anyone can pretend to be you, anyone can use your email address as the sender, in the same way that anyone who sends a postal mail can indicate your address on the back of the envelope. , thus tricking the recipient into believing that you are the sender.
Spammers (people who send mass advertising messages on command) use all possible methods to bypass existing spam filters and achieve their goals.
One such method is to change the sender address of messages they send (either by crafting them or by picking them at random from existing address lists) so as not to arouse the suspicion of recipients. It is therefore difficult to trace the true source of the message since the name and e-mail address displayed are not the correct ones.
These messages generally leave in two different ways: either by a mail server which is poorly protected and which the spammers have discovered and use until the problem is noticed and the fault is closed, or by the Trojan horses which have infected hundreds of thousands of PCs all over the planet and which send messages almost automatically without even the knowledge of the owners of said computers (zombies), at the simple request of a spammer (principle of botnets).
Have I been hacked?
This does not mean in any way that you may have suffered any hacking of your account, theft of an email address or identity theft; rather, it's an attempt to beat spam barriers. It is a scourge against which, unfortunately, we cannot do anything.
The only solution is that all email sending servers in the world are secure and require authentication to send emails, which our servers do. Unfortunately, until all the servers are secure, mail forging has a bright future ahead of it.
Also check if you have a catchall type address on your hosting, in the list of email accounts. If necessary, cancel the possible redirection to your box that you find overloaded, which will considerably limit the return of undelivered emails.