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StartTLS

Top Deliverability > StartTLS

StartTLS

  • August 26, 2024
  • Posted by: Nicola Selenu
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StartTLS, also called opportunistic TLS, is a protocol that upgrades an insecure connection to a secure one on the same port. Initially, client and server communicate in an unencrypted format, determine their encryption capabilities, and then establish a secure channel for the rest of the communication.

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Author:Nicola Selenu

Nicola Selenu is a recognized leader in the Email Industry (with 15 years of professional experience as an Email Marketing and Deliverability Consultant) and an active member of the Anti-Abuse community. Some (of the many) brands that proudly served during his career in Email are: Adobe, Nestlé, Expedia, Gucci, Bulgari, Luxottica, UNHCR, Amnesty International, LastMinute, Acer, Groupon.
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