Tencent ECS failed to send email

describe

Use QQ Email account number smtp Protocol email , Local test successful , Running send on the server failed .

solve

Sending mail requires requesting the mail server 25 port . The outbound security policy of Tencent ECS is turned off by default 25 port .

Operation steps for application opening ：

1. Log in to Tencent cloud console .

2. Click the account name in the upper right corner , Select security control .
   

3. In the left navigation bar , single click 25 Port unsealed , Get into 25 Port unsealing management page .
   

4. Click apply 25 Port unsealed .

5. In the pop-up “TCP 25 Port unsealing application ” Window , Select the region and need to unseal 25 ECS instance of port , Check “ Have read and agree to 《25 Port usage protocol 》”.

After unsealing, it can be sent successfully .