nc smtp.163.com 25 22:06:13
220 163.com Anti-spam GT for Coremail System (163com[20141201])
helo hello
250 OK
auth login
334 dXNlcm5hbWU6
MTgzNaubYjYzOTJAMTYzLmNvbQ==
334 UGFzc3dvcmQ6
enpookmoenpo
235 Authentication successful
mail from: <xxx@163.com>
250 Mail OK
rcpt to: <xxx@qq.com>
250 Mail OK
data
354 End data with <CR><LF>.<CR><LF>
subject: hello mail
from: xxx@163.com
to: xxx@qq.com

hell world
.
250 Mail OK queued as smtp5,D9GowAD3fvO_diJbYMcYBw--.1783S2 1528985394
quit
221 Bye

[nc发送邮件🤔]
$ nc localhost 25 << EOF
HELO host.example.com
MAIL FROM: <user@host.example.com>
RCPT TO: <user2@host.example.com>
DATA
Body of email.
.
QUIT
EOF
— from nc命令 说明

成熟期的巨柱仙人掌通常有六七层楼那样高。在它那巨大的身躯里储存着亿吨以上的水。当地过路人常常砍开这种仙人掌取水解渴。
——Form: 脉动

🎉 Amazing news – Apple has just successfully reviewed our latest update for Telegram iOS, and we were able to ship a new version with long awaited fixes and improvements to the AppStore.

Thank you, Apple! 🍏