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Should You Ignore Delivery Failures of Messages?

Beware of spammers

By Heinz Tschabitscher Heinz Tschabitscher Writer University of Vienna A former freelance contributor who has reviewed hundreds of email programs and services since 1997. lifewire's editorial guidelines Updated on July 13, 2021 Reviewed by Jon Fisher Reviewed by Jon Fisher Wichita Technical Institute Jonathan Fisher is a CompTIA certified technologist with more than 6 years' experience writing for publications like TechNorms and Help Desk Geek. lifewire's editorial guidelines Tweet Share Email Tweet Share Email Email Yahoo! Mail Gmail Delivery failure for email messages you never sent can be alarming, and with good reason. These notices could point to a spammer or virus using your email address. However, you can generally ignore them. Spammers rarely send their unsolicited messages using their own email address in the From field. Not only would this reveal their identity, but it would also allow recipients to write angry replies. (You can still find out where the spam email originated, though, and complain to the spammer's Internet Service Provider.) Authors of worms and viruses desire the opposite of what spammers want, but the result is similar. For infections to spread, social engineering is essential, and the crucial point is that the malicious code appears to come from a friend or trusted source. At the same time, the From line should not contain the email address of the infected computer's owner. The reply from a virus filter notifying them that their computer was infected could alert them. That's why worms put real, but random addresses in the From line. They usually pick them up from the email clients' address books. Both spam and worms don't care who the recipients of their — hopefully millions — of replicas are, the messages often go to email addresses that are inactive, full or have never existed.

When How and Why Delivery Failure Reports Are Generated

Since email delivery usually works (or at least did before overzealous spam filters started blocking legitimate mail), success is not customarily reported, but failures are. For instance, if you mistype an email address, you often receive a detailed, not always easy to parse but usually alarming "delivery failure" message.

Ignore Delivery Failures of Messages You Did Not Send

Now, what happens if a spammer or a virus decides to put your email address in the From line can be annoying, disturbing, or disastrous. If the messages claiming delivery failures of emails you did not write (sometimes, these bounces of emails you did not send are called "backscatter") don't come in the thousands, it is usually best to ignore them. There is little you can do. (If one of the return messages includes the complete headers of the bouncing mail, you can parse them using a spam analysis tool like SpamCop to find where it originates and then inform the ISP that one of their users has a virus. We don't recommend that, though. It will be of little use and consumes additional time and resources. In the case of returned spam, it can be useful to alert the ISP where it originates, though.)

Scan Your Computer for Viruses and Worms Nevertheless

If you do not have a virus scanner installed and can't rule out that your computer is infected by a worm or has been turned into a spam zombie, check your system for viruses (for free) before ignoring the delivery reports. If you get a few hundred of the delivery failure messages per minute, you should inform your ISP so they can filter them out to avoid having your mailbox clogged. Was this page helpful? Thanks for letting us know! Get the Latest Tech News Delivered Every Day Subscribe Tell us why! Other Not enough details Hard to understand Submit More from Lifewire What You Need to Know About Mailer Daemon Spam How to Permanently Delete Your Yahoo Mail Account Can a Router Get a Virus? How to Send Spam to the Spam Folder in Yahoo Mail How to Send Email to Undisclosed Recipients From Gmail Are iPads Really That Safe from Viruses and Malware? How to Send a New Email With iPhone Mail App How to Stop Spam Emails How to Forward an Email as an Attachment in Outlook How to Email a Text 10 Best Free Email Accounts for 2022 How to Send iPhone Mail From a Different Account How to Send Email to Bcc Recipients in iPhone Mail How to Load Images in a Message in Evolution How to See Message Requests on Instagram Is Google Play Safe? Newsletter Sign Up Newsletter Sign Up Newsletter Sign Up Newsletter Sign Up Newsletter Sign Up By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Cookies Settings Accept All Cookies