In Deliver, you can send test or ad-hoc messages from a mailing.
You can also preview the message to see it as if it were being read by a given record.
.png?sv=2026-02-06&spr=https&st=2026-07-31T19%3A34%3A14Z&se=2026-07-31T19%3A45%3A14Z&sr=c&sp=r&sig=554N4eWdp8m%2FaqixSme%2Fz6RF1Vn66ab7R00COeLLgNo%3D)
Previewing a message
To preview a message:
Go to Deliver and select a mailing.
Select Preview Message.
.png?sv=2026-02-06&spr=https&st=2026-07-31T19%3A34%3A14Z&se=2026-07-31T19%3A45%3A14Z&sr=c&sp=r&sig=554N4eWdp8m%2FaqixSme%2Fz6RF1Vn66ab7R00COeLLgNo%3D)
Select a recipient list.
Enter the intended recipient's name in the Record field. Suggested matches appear.
.png?sv=2026-02-06&spr=https&st=2026-07-31T19%3A34%3A14Z&se=2026-07-31T19%3A45%3A14Z&sr=c&sp=r&sig=554N4eWdp8m%2FaqixSme%2Fz6RF1Vn66ab7R00COeLLgNo%3D)
Select a record. Slate checks the record against the filters in your recipient list. The record does not need to meet the criteria already set for the Deliver message.
.png?sv=2026-02-06&spr=https&st=2026-07-31T19%3A34%3A14Z&se=2026-07-31T19%3A45%3A14Z&sr=c&sp=r&sig=554N4eWdp8m%2FaqixSme%2Fz6RF1Vn66ab7R00COeLLgNo%3D)
Select Preview.
The mailing appears in the preview window as if the selected record were viewing it.
Send an ad-hoc or test Deliver mailing
You can send any Deliver mailing as an ad-hoc message to a given recipient. You can also send the message as a test.
Select Send Message.
Configure the following settings:
Type: Select one of the following:
Send Ad-Hoc: Sends the message to the previewed record.
Send Test: Send a test message to an address you provide.
Recipient:
Send Ad-Hoc: The record selected in Preview Record.
Test: Defaults to the current user’s contact information. Can be updated.
Subject: For email messages:
Send Ad-Hoc: Update subject line, if desired.
Test: Same as above, but prepended by default with
[Test].
Message body: Edit the message body as needed.

Select Send. Slate sends the message to the selected recipient.
How do ad-hoc messages affect future sends?
When you send an ad-hoc message to a record before that record meets the recipient list criteria, the record is still added to a saved query run. These query runs show "adhoc" in the memo column.
Because the record already received a message, deduping can affect future runs. If the mailing's deduping is set to “Send only one message/recipient,” the recipient will not receive the message again when they later meet the criteria.
Mailing analytics include both ad-hoc sends and records that met the broader recipient list criteria.