OSError: [Errno 99] Cannot assign requested address【解決】

環境：

雲伺服器（營運商不明） docker python3.6

25端口已打開

報錯的代碼

from flask import Flask
from flask_mail import Mail
from flask_mail import Message

app = Flask(__name__)
app.config['MAIL_SERVER'] = 'smtp.qq.com'
app.config['MAIL_PORT'] = 25
app.config['MAIL_USE_TLS'] = True
# 這個已被我修改，應該是你自己的qq号
app.config['MAIL_USERNAME'] = '[email protected]'
# 這個是你的授權碼，不是密碼
app.config['MAIL_PASSWORD'] = 'password'
mail = Mail(app)

def sendmail():
    msg = Message("Hello",
        sender="[email protected]",
        recipients=["[email protected]"])    
    msg.body = "testing"    
    msg.html = "<b>testing</b>"    
    mail.send(msg)

with app.app_context():
    sendmail()
           

修改後的代碼

from flask import Flask
from flask_mail import Mail
from flask_mail import Message

app = Flask(__name__)
app.config['MAIL_SERVER'] = 'smtp.qq.com'
app.config['MAIL_PORT'] = 587
app.config['MAIL_USE_TLS'] = True
app.config['MAIL_USERNAME'] = '93737[email protected]'
app.config['MAIL_PASSWORD'] = 'rdyuwlebtveybfae'
mail = Mail(app)

def sendmail():
    msg = Message("Hello",
        sender="[email protected]",
        recipients=["[email protected]"])    
    msg.body = "testing"    
    msg.html = "<b>testing</b>"    
    mail.send(msg)

with app.app_context():
    sendmail()
           

可見以上隻改了端口，從25改到587就沒問題了

是以可以初步推斷是25端口被營運商封了，自己打開也等于沒打開，換個端口就好了