The difference between blocking, routing, and monitoring emails

The main distinction between blocking, routing, and monitoring is what happens to the message and what the organization would like to occur. Blocking stops access. Routing changes where the message goes. Monitoring keeps an eye on the message or the activities around it so that the organization may learn, adjust, and reply with more context.

Every action is at a distinct level of certainty. Blocking works for threats that you are sure about, routing works for messages that you are not sure about or that are just an annoyance, and monitoring works for concerns that are new, uncertain, or based on patterns where visibility is important before enforcement.

What blocking suspicious email means

Blocking suspicious email means making a hard stop before the message ever reaches the user. It usually applies to emails that are blatantly trying to steal login credentials, install malware, or do other malicious activities. Paubox uses a similar prevention-first approach through our Inbound Email Security, which is designed to stop phishing, spoofing, malware, ransomware, and spam before they reach the inbox.

Phishing is still a major way for hackers to get in, and hospital workers have shown high click rates in phishing tests as illustrated in a simulation published in Digital Health, with almost 1 in 7 emails clicked on in one multicenter sample, making blocking a necessary tool. Technical measures that discover or filter out questionable incoming emails before they are sent reduce the number of times a busy employee has to make a security choice while they are doing clinical or administrative work.

What routing suspicious email means

Routing suspicious email means redirecting a message away from the primary inbox instead of fully rejecting it. Depending on how the organization is set up, a routed message could end up in spam, garbage, quarantine, or an administrator review queue.

Routing works well for emails that you would rather not receive, including graymail, medium-confidence communications, or emails that appear suspicious enough to keep out of the inbox but not harmful enough to delete. The middle-ground approach is helpful in healthcare, where organizations receive a lot of emails and a lot of potentially harmful traffic, but they also need to communicate with people outside of the organization to accomplish their tasks.

Routing safeguards systems as well as staff members' attention. Especially when, as a BMJ Health & Care Informatics study puts it, “Phishing typically requires the recipient to perform an action, it relies on social engineering techniques, with many contacts therefore appearing to be from trusted sites such as financial institutions, or in the case of healthcare data, IT administrators or healthcare staff.” Putting a message in the inbox tells staff its status, how important it is, and how likely it is to be opened promptly. Moving mail that looks suspicious to a place with less trust lowers that vulnerability while still allowing access when an authentic message gets caught.

What it means to monitor suspicious emails

A Security Journal study noted, “Organizations can offer better guardianship by tracking email replies and monitoring the IP addresses involved. Many phishers fill the ‘from’ field in their emails with a legitimate-looking address. However, they often do not control the address listed in the ‘from’ field.”

Monitoring suspicious email means watching, logging, scoring, and reviewing questionable activity without always taking an immediate delivery action. A program that is monitored is designed to identify patterns, including repeated suspicious senders, peculiar login behavior following email interactions, recurring message themes, abnormal attachment behavior, and trends in the content that employees are receiving or clicking. Security teams are provided with visibility into the mail traffic through monitoring. Monitoring suspicious email exchanges and logins is a component of identifying phishing attempts. Consequently, monitoring is less about inert observation and more about structured awareness.

Monitoring is particularly beneficial when hazard patterns evolve at a pace that static regulations are unable to accommodate. Phishing campaigns are in a state of perpetual evolution, and detection systems that fail to adapt may experience a decline in their effectiveness over time. The value of sustained detection methods has been demonstrated in the context of phishing detection, as feature distributions and attacker behavior are subject to change over time. Conversely, broader intrusion detection research continues to differentiate between signature-based methods that correspond to known threats and anomaly-based methods that seek out unusual behavior.

Why healthcare organizations need all three

Healthcare organizations need blocking, routing, and monitoring at the same time because healthcare email risk is both technical and operational. As the authors in a Perspectives in Health Information Management study explain, “Technical safeguards to protect electronic health records must be combined with human behavioral interventions to promote a robust cybersecurity plan.” Phishing remains one of the most common ways attackers reach healthcare staff, and the same paper found that “more patient records are compromised from falling for a phishing scam than any other reason.”

A program built around only one control leaves gaps. Blocking alone can be too rigid, routing alone can leave too much risky content recoverable without enough oversight, and monitoring alone can create visibility without timely protection. Paubox combines AI-powered analysis with filtering and rules-based controls, quarantines phishing and malware, offers spam folder routing for gray mail, and gives administrators visibility through quarantine review and dashboard tools.

See also: HIPAA Compliant Email: The Definitive Guide (2026 Update)

FAQs

How does suspicious email handling affect staff experience?

The way email is managed shapes how much clutter users see, how often they are interrupted, and how much they have to rely on their own judgment to stay safe.

Why does visibility matter in email security?

Visibility helps teams understand what threats are getting through, what controls are working, and where policies may need to be adjusted.

What happens when email controls are too aggressive?

Overly aggressive controls can block legitimate communication, frustrate users, and create workarounds that increase risk instead of reducing it.