Table of contents
If you're an IT professional or a developer looking to implement an email notification system in .NET Framework 4.8, SendGrid offers a robust API solution that simplifies this process.
Create the EmailService Class#
The EmailService class will be responsible for handling email-sending logic.
Within this class, the Send method will implement the email-sending functionality using the SendGrid.
Here’s a breakdown of the Send method:
Setup Mail Message:
Sets up MailMessage with HTML formatting, "From" address, recipient (to), subject, and HTML body (bodyHtml).
Optional Attachments and Reply-To:
- Adds an attachment if filePath is provided.
- Adds a reply-to address if replyTo is specified.
Send Email:
Uses SmtpClient to send the email.
Error Handling:
Logs SMTP-specific and general errors if email fails to send, returning false on failure and true on success.
Testing the Send Method in Program.cs#
Once the EmailService class is set up, you can test the Send method by passing the recipient's email address, subject, and body content.
Here’s an example:
Important Considerations#
Sender Verification: Make sure the fromEmail address is verified in your SendGrid account to avoid errors like "The from address does not match a verified Sender Identity."
SSL/TLS: SendGrid requires EnableSsl = true for security.
Credentials: The smtpUser field must be set to "apikey", which is a SendGrid requirement when using SMTP with an API key.
Verify Your Sender Identity#
Before sending emails, you must verify the Sender Identity.
Sender Identity is the verified email address or domain that an email service provider (like SendGrid) associates with your account and authorizes to send emails on your behalf.
It’s essential because it ensures that only trusted and authorized senders can send emails from your domain, reducing the chances of spam or phishing attacks.
Unverified email addresses will result in an error, commonly this one:
Wrapping Up#
Following this guide, you can quickly implement email notifications in .NET Framework 4.8 using SendGrid.
This approach allows you to create robust and scalable notification systems for various use cases, from account verifications to support and marketing emails.
What's Next?
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