Azure server to Sendgrid connectivity

Dutta, Sreya 31

Hi ,

I want to setup connection from my azure server to sendgrid , How Can I do that , what are the flows I need to open in NSG level?

GitaraniSharma-MSFT 49,836 Reputation points Microsoft Employee

2023-02-17T16:17:48.96+00:00

@Dutta, Sreya , Could you please provide an update on this post? Kindly let us know if the below helps or you need further assistance on this issue.
Dutta, Sreya 31 Reputation points

2023-02-21T11:02:20.9766667+00:00

thanks , its working

1 answer

Arun Siripuram 891 Reputation points

2023-02-07T07:54:09.7633333+00:00
Thank you for posting your query on Microsoft Q&A.

To set up a connection from an Azure server to SendGrid, you will need to open the following ports in the Network Security Group (NSG) level:

Port 587: This is the default port for SMTP (Simple Mail Transfer Protocol) communication.

Port 25: This is an alternate port that can be used for SMTP communication if port 587 is blocked by a firewall.

You can add these ports in your NSG inbound security rules.

Please note that it's recommended to only allow incoming traffic from trusted sources to these ports and to monitor network traffic for any suspicious activity.

Please refer https://docs.advantys.com/workflowgen-for-azure/azure-sendgrid-smtp-configuration

https://docs.sendgrid.com/for-developers/partners/microsoft-azure-2021#create-a-twilio-sendgrid-account
Please sign in to rate this answer.
Dutta, Sreya 31 Reputation points

2023-02-07T09:00:42.5866667+00:00

Hi , source is my azure server and destination is sendgrid , then what will be the destination Ip

Arun Siripuram 891 Reputation points

2023-02-07T11:26:49.8333333+00:00

Source is Azure and Destination IP will be SendGrid in your case.

Dutta, Sreya 31 Reputation points

2023-02-07T12:08:49.98+00:00

okay Im using pro 100k plan , sendgrid has provided dedicated Ip for this.

I have opened the flows in nsg outbound port 587 , will it work?

GitaraniSharma-MSFT 49,836 Reputation points Microsoft Employee

2023-02-13T08:33:11.48+00:00

Hello @Dutta, Sreya ,

As mentioned in the SendGrid documentation,

SendGrid accepts unencrypted and TLS connections on ports 25, 587, & 2525. You can also connect via SSL on port 465. Many hosting providers and ISPs block port 25 as a default practice. We recommend using port 587 to avoid any rate limiting that your server host may apply.

So, you should be able to connect to SendGrid on port 587 from your Azure server.

May I know what is the current status of this issue? Are you facing issues in connecting to SendGrid?

Regards,

Gita

Crook, Paul 0 Reputation points

2025-02-05T19:05:55.18+00:00

What IP Source and Destination IP's do you need on the NSG?

Do you only need an Outbound allow rule or do you need an Inbound one too?

KapilAnanth-MSFT 48,791 Reputation points Microsoft Employee

2025-03-04T12:13:36.82+00:00

Crook, Paul,

You should work with Sendgrid to get the range of IPs or a dedicated IP based on your setup.

For outbound communication from an Azure VM to any Public server, you are required only to create an outbound NSG Rule.

Cheers,

Kapil
Sign in to comment

Use comments to ask for clarification, additional information, or improvements to the question.

Share via

Azure server to Sendgrid connectivity

1 answer

Your answer