---
name: email-delivery-about
title: About email delivery for Classic
description: SendGrid, IBM Cloud® email delivery service for Classic infrastructure, is a mail relay service. With this service, you can use a smart host to relay your outbound mail services. A smart host relays SMTP traffic from an SMTP server, mail client, or any other service or programming language capable of handling SMTP. This service also generates metrics, tracks email lists, and tracks email activity such as bounced, clicked, dropped, and opened emails. Other available features are offered with this service such as newsletter assistance and authentication.
last-updated: 2025-04-17
---

> ## Documentation Index
> The table of contents for this documentation set is at https://cloud.ibm.com/docs/email-delivery?format=markdown
> The index for all IBM Cloud docs is at: https://cloud.ibm.com/docs/llms.txt
> Use these files to discover more information as needed.

# About email delivery for Classic
{: #about-email-delivery}

SendGrid, IBM Cloud® email delivery service for Classic infrastructure, is a mail relay service. With this service, you can use a smart host to relay your outbound mail services. A smart host relays SMTP traffic from an SMTP server, mail client, or any other service or programming language capable of handling SMTP. This service also generates metrics, tracks email lists, and tracks email activity such as bounced, clicked, dropped, and opened emails. Other available features are offered with this service such as newsletter assistance and authentication.