Ubuntu system installs the latest enterprise version of GitLab, but cannot send email without installing postfix,

Kotlin
IOS
VB.Net
SQL
Node.js
Swift
Ruby
Go
Oracle
Git
Laravel
Mongodb
Asp.Net
More...

this is the configuration information. Is there a problem?
what is the relationship between postfix and mail service? can"t you send mail without postfix?

Gitlab ubuntu

Mar.03,2021

Previous: Can't springmvc's exception handlers catch mysql exceptions?

Next: For the implementation of commodity sku array, it is best to use reduce

False
Django, Why does the system automatically generate an empty session? every time the request is made?
Use python to convert dict1 to dict2, in the example. I tried for a long time but couldn't find a solution.
How to self-start the php-fpm service when building a LNMP environment with docker?
Can an array in react state be bound to a dom state using an element in the array?
Wechat browser version 6.6.5 cannot prevent the springback of pull-up and drop-down to the top under ios system.
In express+hbs, how do you define the routed data as a variable on the page?
How to use symbol reference of Iconfont in dva
How to elegantly add data to JSON objects?
Using node to build video streaming server
The proportional width of the echarts graph is inconsistent.
React uses axios to call the background data. After success, how to jump to the page based on the returned value?
I don't understand what a linux command means. Please explain it.
Vue introduces multiple components in vue-router by nesting named views, and does not refresh the same reference in other pages.
Running nodejs reports fewer errors ")"

Js uses foreach to traverse, and then style.marginLeft dom to find that it is useless, ordinary for loops can, why?
How does tinyMCE separate menus from content
The jq input box always displays the default text
Uc sharing icon settings
There is a time array object, time is not continuous, how to complete better?