Definition of SMTP in English:

SMTP

Syllabification: SMTP

abbreviation

Computing
Simple mail transfer protocol, a data transmission format used to send and receive e-mail.

Definition of SMTP in:

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up