Financial organizations and digital banking providers demonstrate Bulgaria's strongest baseline SPF configuration and leading DNSSEC adoption rates. However, while a notable share has advanced toward active p=reject or interim p=quarantine policies, an unprotected segment remains without DMARC records entirely. Furthermore, valid MTA-STS implementation across financial sending mail servers remains virtually nonexistent, leaving inter-bank correspondence vulnerable to transit eavesdropping.
State ministries, administrative agencies, and municipal public portals maintain broad initial SPF coverage. Nonetheless, policy progression remains sluggish, with a large share of official public domains lingering without DMARC or remaining stagnant under passive p=none observation. DNSSEC deployment remains limited across regional administrative portals, and MTA-STS encryption is absent from nearly all analyzed public messaging systems.
Healthcare providers, regional hospital networks, and pharmaceutical distributors present significant exposure to identity spoofing. Over half of medical domain assets lack published DMARC records, while active p=reject enforcement remains restricted to a tiny fraction of providers. The near-total absence of MTA-STS and DNSSEC exposes patient confidentiality and clinical communications to transit manipulation and fraudulent doctor impersonation.
Higher education institutions and academic research academies across Bulgaria rely overwhelmingly on unmonitored or passive monitoring policies. The vast majority of universities operate without DMARC records or remain frozen at p=none, leaving student records, academic intellectual property, and research databases vulnerable to credential harvesting scams. Cryptographic DNSSEC and MTA-STS adoption remain negligible.
Critical utility providers, grid operators, and energy distribution networks show solid baseline SPF consistency. However, a significant portion of energy domains continue without active DMARC protection, leaving them exposed to supply chain pivoting exploits. While the sector exhibits slight adoption of transport encryption, the vast majority of utility communications remain unshielded by MTA-STS protocols.
Bulgarian news publishers, broadcasting networks, and digital media portals display exceptionally low enforcement rates. The vast majority of media domain names either completely lack DMARC or rely exclusively on passive monitoring modes. This vulnerability makes trusted editorial and journalistic brands susceptible to spoofing and unauthorized dissemination of false alerts. MTA-STS deployment is nearly absent across newsroom servers.
National telecommunications providers and network operators show commendable baseline SPF implementation alongside moderate DNSSEC enablement. However, a noticeable share of carrier sending domains still operate without DMARC enforcement, leaving corporate subscription desks open to customer-facing phishing campaigns. MTA-STS coverage remains confined to an extremely small subset of production mail exchanges.
Regional freight forwarders, Black Sea maritime port operators, and commercial transport enterprises exhibit mixed security baselines. While fundamental SPF entries are prevalent, widespread absence of DMARC records leaves shipment notifications and customs documentation susceptible to header forgery. Transit encryption via MTA-STS is almost completely missing, leaving route logistics and cargo records unencrypted across mail exchanges.
