Frequently Asked Questions

Integration
Sender Authentication
Marketing Campaigns
Deliverability
Billing

If you have not already, we suggest you take a look at our Pricing Page to help select the best plan for your needs. If you have already signed up and have additional questions please see our Account Sign Up FAQ.

There are several different methods that can be used to send through SendGrid. Take a look at our Integrate with SendGrid page for information on how to connect with SMTP or our Web API.

API Keys allow you to generate an authentication credential that is separate from your username and password. They are independent from one another and are easily disposable. You should create unique API keys for each of your applications or servers so that you can easily revoke them without disrupting other systems if needed. For more information, click here.

We recommend using "apikey" for your SMTP username and creating an API Key to use for your password. For more information, click here.

SendGrid offers Two Factor Authentication and IP Access Management features to secure your account. Additional security information can be found here.

Sender Authentication is the functionality that shows ISPs that SendGrid has your permission to send emails on your behalf. This permission is given by the act of pointing very specific DNS entries from your domain registrar to SendGrid. To learn more about how and why to setup Sender Authentication, see the article listed here.

A common hurdle that many users encounter during the Sender Authentication process is that DNS records fail to validate, even though the records were just created! For some steps you can take to troubleshoot potential issues with recently created DNS records, click here.

Marketing Campaigns is a powerful tool that can easily send beautiful, well-targeted email marketing campaigns. More information about all of the features of Marketing Campaigns can he found here.

The first step to include an unsubscribe link is to create an unsubscribe group. Unsubscribe groups allow your readers to opt out of certain types, or groups, of emails instead of globally unsubscribing from all of your emails. Unsubscribe groups are especially useful if you send several very different types of email to the same recipients. To see learn how to setup your first unsubscribe group, click here.

The SendGrid web API allows you to manage your Marketing Campaigns contacts. Complete documentation is available here. You can also view our interactive documentation here.

It is common to have contacts that result in a group unsubscribe, block, bounce, invalid email address, or spam report. Attempting to send email to these contacts can negatively impact your reputation since these contacts do not want to (and will not) receive your marketing emails. By continuing to store these contacts, you are being charged for recipients that will automatically be dropped. Learn how to remove these contacts here.

The documentation page has answers to many more common questions you might come across about Marketing Campaigns.

There are numerous reasons why email providers place messages into the Spam folder. While there is no surefire way to ensure your messages arrive into the inbox of your recipients, there are however industry standards and best practices you can follow to give your emails the best chance of meeting all mail provider and spam filter expectations.

Check out our Deliverability 101 guide to get started with general guidelines on email ettiquite and sending practices.

After reading our Deliverability 101 guide, take a deep dive into advanced email delivery with Sendgrid's Official Email Deliverability Guide.

For troubleshooting tips on this situation, please see the article listed here.

For explantation of bounces, please see the article listed here.

For explantation of drops, please see the article listed here.

For explantation of email throttling and deferral messages, please see the article listed here.

Learn more about what you're paying for with our "How to read your invoice" article.

Learn more about billing for Marketing Campaigns such as contact storage here.

Learn more about how to update your card information here.