SES Connectivity issue

Question

I am experiencing an issue when sending emails from a Lambda function. When I send a large number of emails, I receive the following error:

```
connect ETIMEDOUT 15.204.22.185:443

error.address	15.204.22.185
error.code	ETIMEDOUT
error.errno	-110
error.port	443
error.syscall	connect
```
the lambda function is in eu-west-1

Answer

Hi,

Have you taken a look at the following [re:Post question](https://repost.aws/questions/QUq-W-JNbBR6Cpwx3xVlaZiA/ses-connectivity-issue)? It seems very similar to your case.

> If you are experiencing intermittent TCP connection timeout with a working public endpoint then it’s also something that we need to troubleshoot from the Lambda service itself. Because this may be due to packet fragmentation. Lambda functions cannot handle incoming fragmented TCP requests, since Lambda does not support IP fragmentation for TCP or ICMP.

SES Connectivity issue

Relevant content