Opera

There is a variety of software that permits a bulk mailer to send messages to a large number of recipients on a particular Internet provider, even if they do not know their specific addresses. The software attempts to send a message to every address on that domain (starting with aaa, aab, aac, etc.), not caring about the number of "undeliverable" messages that will be generated from all the incorrect guesses. We believe some spammers may then track which addresses came back as undeliverable, and remove those addresses from their lists. These mailing lists are then sold to other spammers.

Another possibility is that the spammer takes a harvested/known username for an e-mail service and tries this on other services as well (as an example, they already have abuse@opera.com, and therefore try abuse@operamail.com and abuse@example.com as well).

This may explain why sometimes you see spam mail which appears to be targeted at an alphabetical list of customers, or why you receive spam mail at an address which you may not have publicized.

Please use the "Report spam" button in Opera Web Mail in order to report spam, and to improve the spam filters.

If you receive a mail from an Opera Web Mail user, you can submit a Request, and we will in most cases close down this account.

If you receive spam from other e-mail services, I would recommend you to write to their abuse addresses.

You can use SpamCop to report the spam to the ISPs it originated from.