Send Single Email
Send Immediately will connect to your SMTP server in real-time during submission. If delivery fails, it shows the error trace. Add to Queue queues the email to be safely sent according to SMTP speed limits.
Ad-Hoc Messaging Tips

Use the single sender for one-off service notifications, system testing, or follow-ups that do not warrant a full project campaign.

Direct Mailer Logging: Every email sent via this form is logged under the main queue table for audit records, regardless of whether you choose Instant or Queue delivery.

If an instant delivery fails, you can review the detailed transaction error under the Campaigns & Queue section logs.

Note: Personalization placeholders (like {{name}}) are supported in Queue mode since they map to recipient tables, but are not active for Instant sending.