What is the maximum number of mail I can send?

Our 20:20 feature allows you to send a maximum of 500 letters within one batch.  The advised number of postcards to generate at once is around 250 due to them having larger file sizes.

The Campaigns feature will allow you to target around 10,000 properties in one campaign.

There is no limit to the amount of mail you can send within Spectre, so if you would like to send more than this then you can do so by generating multiple batches from any feature page.