We've curated 128 cybersecurity statistics about Email to help you understand how phishing attacks, spam filters, and encryption practices are evolving in 2025, ensuring your communication remains secure in an increasingly digital world.
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52% of healthcare organizations use secure email gateways to protect against email-based attacks, which is a 7-point increase from 2024.
86% of US IT leaders indicate that more than half of their business communication flows through email.
Email remained the top vector for delivering malware, accounting for 61% of threats caught by HP Sure Click in Q2 2025. This was a 1 percentage point drop compared to Q1 2025.
In Q2 2025, 13% of malicious emails (phishing, malware, etc.) were not blocked by the email gateway security system. This is 1 percentage point higher than in Q1 2025.
41% of healthcare organizations are now classified as high-risk. This compares to just 31% last year.
The sharp rise in Microsoft 365 email breaches in healthcare represents a 21% increase year-over-year.
The average healthcare email breach exposed nearly 16,000 individual records in the first half of 2025.
IT leaders estimate that only 5% of known phishing attacks in healthcare are actually reported by employees to security teams.
Cyberattacks are cited as the leading cause of critical workflow disruptions by 50% of healthcare organizations.
Incidents involving Proofpoint email customers accounted for 6% in healthcare.
Business associates (including billing vendors, imaging firms, and outsourced IT providers) were involved in 17 of the 107 email-related breaches in healthcare. This represents 16% of all incidents.
The Episource breach affected 5.4 million individuals
81% of healthcare email breaches were classified as hacking or IT incidents.
Incidents involving Mimecast email customers accounted for 8% in healthcare.
The largest single email breach, affecting United Seating and Mobility, exposed over half a million records.
Microsoft 365 environments now account for 52% of all healthcare email breaches. This represents a dramatic surge from 43% just one year ago.
79% of breached healthcare organizations have ineffective DMARC protection. This is up dramatically from 65% in 2024.
More than 1.6 million patient records were compromised across all analysed email-related healthcare incidents that occurred in the first half of 2025.
Incidents involving Barracuda email customers accounted for 5% in healthcare.
40.57% of respondents said email looking legitimate was a factor in fraudsters successfully bypassing enterprise systems.