Subject + 又 + 发 + 了
The verb 发 (fā) means 'to send' or 'to issue' and is one of the most frequently used verbs in Chinese. In short phrases like 又发了, it conveys that something was sent again. The addition of 了 indicates the action has been completed.
妈妈又发了好几条语音消息。
Māma yòu fāle hǎo jǐ tiáo yǔyīn xiāoxī.
Mom sent several more voice messages.
他刚才发了一个红包。
Tā gāngcái fāle yí ge hóngbāo.
He just sent a red envelope.
老师发了通知,明天不用上课。
Lǎoshī fāle tōngzhī, míngtiān bú yòng shàngkè.
The teacher sent a notice that there's no class tomorrow.