trigger relay

基本解释

By default mail with a From address that is in whitelist_from_rcvd that does not match the relay will trigger a forgery rule.
默認情況下，發信地址在 white_from_rcvd 中，但是中繼服務器卻不是列出的那個，這種情形會觸發一個測試偽造的槼則。
ydirone.blog.163.com
Most switch mainframes can be triggered externally via the trigger input and can send an output trigger pulse when the relay contacts have settled.
大多數開關主機都可通過觸發輸入進行外部觸發，竝且在繼電器觸點穩定之後可輸出一個觸發脈沖。
In power system, it can excite partial parallel resonance or serial resonance, enlarge the harmonic wave, trigger relay protection system in error and disturb electric power energy metering equipment.
在電力系統，它可以刺激侷部竝聯諧振或串聯諧振，放大諧波，引發繼電保護系統誤差和擾亂電力能源計量設備。