When looking at email attachments, be wary of unexpected files, check the sender's address carefully, watch for urgent or emotional language, and scrutinize file types like .exe, .zip, or macro-enabled Office files (.docm, .xlsm), as they can hide malware, even if they seem to come from a known contact. Always verify legitimacy through another channel (like a phone call) before opening or clicking anything from unknown or suspicious sources to prevent phishing and malware infections, say MailGuard, Cyber.gov.au, and Proton.
5 Types of email attachments you should look out for
The Rule of 5 is straightforward: it's the practice of limiting your email actions to just five key moves: delete, delegate, respond, defer, or do.
You can check if an email attachment is safe by having antivirus software scan the attachments in your emails, double-checking who the sender is and not opening any attachments that are marked as spam. Keep reading to learn more about unsafe email attachments and how you can keep yourself from falling victim to them.
Scan for Malware: Always scan attachments for viruses or malware before sending them. This is crucial for maintaining digital safety and trust. 2. Sensitive Information: If you're sending confidential or sensitive information, consider using encryption or password protection.
For effective communication, remember the 5 C's of communication: clear, cohesive, complete, concise, and concrete. Be Clear about your message, be Cohesive by staying on-topic, Complete your idea with supporting content, be Concise by eliminating unnecessary words, be Concrete by using precise words.
Unexpected or suspicious email attachments should never be opened. They may execute a disguised program (malware, adware, spyware, virus, etc.) that could damage or steal your data. If in doubt, call the sender to verify.
Cybercriminals are increasingly targeting victims with PDF phishing attacks that steal sensitive information or install malware without the victim's knowledge. These attacks are perpetrated with innocuous-looking email attachments that contain a PDF virus.
You can download the file without opening it and scan it with File Checker to see if it's secretly harboring malware. Even files you download from seemingly-legitimate online repositories can be infected. Use the free File Checker tool to upload a hash of the file to our servers and scan it for hidden malware.
Effective email communication is an art that requires attention and diligence. Applying the 7C method – clarity, conciseness, concreteness, correctness, coherence, completeness, and courtesy – will help you create messages that are not only professional but also effective.
The "+1 email trick," also known as plus addressing, lets you create infinite email variations for a single Gmail account by adding +anything after your username (e.g., [email protected]), with all emails still arriving in your main inbox. This is great for filtering spam, identifying data sellers (if [email protected] gets spam, you know Facebook shared your info), and organizing subscriptions without needing new accounts.
Use the appropriate level of formality
For instance, begin with “Dear _____”, use “please” and “thank you” where necessary, and always end your email with the appropriate phrase, “Kind regards”, “Thank you”, “Sincerely” and so on.
The "3 Email Rule" is a productivity guideline suggesting that if an email conversation goes back and forth more than three times (three messages sent and received), it's time to switch to a more direct communication method, like a phone call, video chat, or in-person meeting, to avoid miscommunication, clarify issues, and save time. This rule helps resolve complex discussions efficiently by leveraging richer communication channels that include tone and non-verbal cues, which emails lack.
Tips for Recognizing a Malware Email
Below are some of their – and my own – tips to avoid the most common email mistakes:
There isn't one single "most hacked" provider, but Gmail (Google) and Microsoft Outlook are the most targeted due to their massive user bases, making them prime targets for attackers, with reports showing massive increases in attempts against Gmail and Microsoft being the most impersonated brand in phishing. While these giants face high attack volumes, their security is robust; services like Proton Mail and Tuta (Tutanota) are considered more secure for privacy due to features like zero-access encryption, though they are less frequently targeted because of smaller user bases.
Here's what to do if you opened a spam email attachment: Disconnect from the internet immediately – This limits the attacker's access. Run a full malware scan – Use a reputable antivirus program. If malware is detected, follow the removal instructions carefully.
Signs on your device
Phishing emails are designed to look authentic, but by knowing the red flags (suspicious links, scare tactics, requests for sensitive information, unusual email addresses, poor spelling/grammar, and unexpected attachments) you'll be ready to spot scams before they cause harm.
The Department of Social Security Administration (SSA) has identified four ways to spot a scam, known as the four Ps: Pretend, Problem, Pressure, Pay.
The 7 key indicators of a phishing attempt
Save and scan any attachments before opening them.
If you think you've accidentally opened a phishing PDF, it's important to immediately disconnect your device from the internet, back up your files, run a virus scan on your device and change your passwords.
Potentially dangerous file types