## MailOptions.subject property [​](/content/docs/sdk/core.mailoptions.subject#mailoptionssubject-property "Direct link to MailOptions.subject property"/index.html)

The subject of the e-mail

**Signature:**

```typescript
readonly subject?: string;
```

- [MailOptions.subject property](/content/docs/sdk/core.mailoptions.subject#mailoptionssubject-property/index.html)