Stop Spam: Learn How Email and Text Work

How Email Messages Travel Across the Internet

Email works through a system of computers called servers that send and receive messages. When you write an email and click send, your message doesn't go directly to the recipient's inbox. Instead, it travels through several steps to reach its destination.

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First, your email client (like Gmail, Outlook, or Apple Mail) connects to an outgoing mail server using a protocol called SMTP, which stands for Simple Mail Transfer Protocol. This server reads the recipient's address and looks up where their mail server is located. Think of it like addressing a physical letter—the postal system needs to know where it's going.

The message then travels across the internet through multiple pathways. Email can take different routes depending on network conditions, similar to how a delivery truck might take different streets based on traffic. This journey typically takes seconds, but can occasionally take minutes or hours if servers are busy or having problems.

Once the email reaches the recipient's mail server, it sits in their mailbox until they check it. When they open their email client, it connects to an incoming mail server using either IMAP or POP3 protocols. IMAP lets people see their messages on multiple devices while keeping them on the server. POP3 downloads messages to a single device and usually removes them from the server.

Understanding this process helps explain why emails sometimes get delayed or lost. Servers can experience technical problems, network outages can interrupt transmission, and mistyped addresses cause messages to bounce back. According to research from Statista, about 45% of emails sent globally in 2023 were spam, meaning legitimate messages travel alongside billions of unwanted messages through the same systems.

Practical Takeaway: Knowing how email travels helps you understand why you should save important messages—if you use POP3 and accidentally delete an email from your device, it may be gone forever. Using IMAP provides a backup by keeping messages on the server.

Understanding Text Message Delivery Systems

Text messages, or SMS (Short Message Service), work differently from email but share a similar basic concept—they travel through networks to reach a destination. Text messages move through cellular networks rather than the internet, though modern systems often blend both technologies.

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When you send a text, your phone connects to your cell phone carrier's network infrastructure. Your carrier is the company providing your cellular service, such as Verizon, AT&T, T-Mobile, or regional carriers. The message passes through their systems, which must first locate the recipient's phone on their carrier's network. If you're sending to someone on the same network, the journey is shorter. If you're sending to a different carrier, your message must pass between networks through special connections called gateways.

Text messages are limited to 160 characters per message when sent as standard SMS. When you send a longer message (anything over 160 characters), your phone automatically splits it into multiple SMS messages. These arrive as separate texts but usually appear as one continuous conversation on modern phones. This limitation exists because SMS was developed in the 1990s when technology was much simpler.

The delivery path for texts is relatively straightforward compared to email. The message travels from your phone to your carrier's text message center, then to the recipient's carrier's text message center, then to the recipient's phone. The entire process typically takes seconds. However, text messages can fail to deliver if the recipient's phone is off, outside network coverage, or if their mailbox is full.

According to the CTIA (trade association for the wireless industry), Americans sent approximately 2.2 trillion SMS messages in 2021. Despite the rise of internet-based messaging apps, text messaging remains a reliable communication method with high delivery rates—estimates suggest SMS has a 98% delivery success rate, higher than many other communication methods.

Practical Takeaway: Since text messages are limited in length and rely on carrier networks, they're useful for short, important messages. For longer conversations, internet-based messaging apps (which use data rather than SMS) may be more practical, but they require an internet connection.

How Spam Gets Into Your Email and Text

Spam reaches your inbox through methods that exploit the open design of email and text systems. Understanding these techniques helps you recognize why spam happens and what makes you vulnerable to receiving it.

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Email spam begins with spammers obtaining email addresses through several common methods. They use automated programs called bots that scan the internet looking for email addresses posted on websites, forums, social media, or public directories. They purchase stolen lists from hackers or data brokers. They also use a technique called "dictionary attacks," where they generate common email addresses at popular providers (like john@gmail.com, jane@gmail.com) and send messages to thousands at once, knowing some will reach real people.

Once spammers have email addresses, sending messages costs them virtually nothing. The barrier to entry is extremely low—they can send millions of emails for only a few dollars in server costs. Because of this low cost, even if only a tiny fraction of recipients respond (like 0.1%), the campaign is profitable. Spammers rely on volume; they send billions of messages knowing that most will be ignored but some will generate money through clicks, purchases, or data collection.

Text spam works similarly but uses slightly different methods. Spammers obtain phone numbers from data breaches, apps that request permission to access your contacts, or by purchasing lists from data brokers. They also use random number generation to send texts to numbers likely to be active. Text spam is particularly profitable because SMS delivery guarantees the message reaches the recipient's phone almost immediately.

The Federal Communications Commission reported that Americans received an estimated 3.7 billion spam text messages in 2021 alone, with numbers continuing to rise. Email spam has remained consistent at roughly 45-50% of all email traffic for several years, according to Statista's 2023 report. This volume exists because spammers face few consequences—enforcement is difficult across international borders, and the profit margins are high enough to continue despite spam filters catching most messages.

Practical Takeaway: Spammers are looking for valid, active email addresses and phone numbers to exploit. Avoid posting your contact information publicly online, be cautious about sharing it with unfamiliar companies, and be skeptical of requests asking you to provide or verify your contact details.

Recognizing Spam Messages and Phishing Attempts

Spam comes in many forms, and while some messages are obviously unwanted advertisements, others are designed to deceive you. Learning to identify different types of spam protects you from financial loss and identity theft.

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Common spam categories include unsolicited commercial email (advertisements), phishing messages (designed to steal your information), malware distribution (messages containing harmful software), and financial scams (messages promising money or requesting payment for fake services). Each type uses different tactics to succeed.

Phishing messages are particularly dangerous because they appear to come from legitimate companies. A typical phishing email might claim to be from your bank, saying your account needs verification due to suspicious activity. The message includes a link that looks like it goes to your bank's website, but actually leads to a fake website designed to look identical. When you enter your login information, the scammers capture it.

Several characteristics can help you identify suspicious messages. Spelling and grammar errors are common in spam—legitimate businesses hire professional writers who catch mistakes. Phishing messages often use generic greetings like "Dear Customer" instead of your actual name, which real companies usually include in their records. Urgent language demanding immediate action ("Verify your account now or it will be closed") is a major red flag—banks and legitimate companies don't threaten account closure via email.

Suspicious links are another warning sign. In email, hover your mouse over a link without clicking to see where it actually goes. If a message claims to be from your bank but the link points to a different website, it's almost certainly phishing. Similarly, text messages asking you to click links or reply with personal information should be treated with extreme skepticism.

The Anti-Phishing Working Group, which tracks cybercrimes, reported that phishing attacks increased 87% from 2022 to 2023, with over 4.7 million phishing sites detected in 2023 alone. These numbers show how widespread this problem has become, making education essential for protection.

Practical Takeaway: When you receive a message asking for information, contact the company directly using a phone number or website you find yourself rather than using contact information in the message. A legitimate company won