使用Python SMTP调用AWS SES发邮件时遇'function' object has no attribute 'encode'错误

错误原因 #

• 核心问题：msg['From'] = self.send_email 错误地将类的send_email方法对象赋值给邮件的From字段，而非正确的发件人邮箱地址。后续处理邮件时，程序尝试对方法对象执行encode操作，触发报错。
• 次要问题：except for Exception as e: 存在语法错误，多余的for会导致异常捕获失效。

修复后的完整代码 #

import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart

import common.config_constants as constants


class Email_util:

    def __init__(self) -> None:
        self.smtp_server = 'email-smtp.us-east-1.amazonaws.com'
        self.smtp_port = constants.SMTP_PORT
        self.workmail_user = constants.SMTP_USER
        self.workmail_pass = constants.SMTP_PASS
        self.sender = constants.FORGOT_PASSWORD_EMAIL_HANDLER

    def send_email(self, receiver, subject, body):
        msg = MIMEMultipart()
        # 修正：使用预定义的发件人邮箱地址
        msg['From'] = self.sender
        msg['To'] = receiver
        msg['Subject'] = subject

        # Attach the email body
        msg.attach(MIMEText(body, 'plain'))

        try:
            # Establish a connection to Amazon WorkMail SMTP server
            server = smtplib.SMTP(self.smtp_server, self.smtp_port)
            server.starttls()

            # Login to Amazon WorkMail
            server.login(self.workmail_user, self.workmail_pass)

            # Send the email
            server.sendmail(self.sender, receiver, msg.as_string())

            print("Email sent successfully!")
            return True
        # 修正：移除多余的for关键字
        except Exception as e:
            print(f"Error sending email: {e}")
            return False

关键修复点说明 #

• 替换msg['From']的赋值内容：把方法对象self.send_email换成类初始化时定义的发件人邮箱self.sender，确保From字段是合法的邮箱字符串。
• 修正异常捕获语法：删除except后的for关键字，让异常处理逻辑正常工作。

内容的提问来源于stack exchange，提问作者Biswas Sampad