A lot can hinge on a promptly sent thank-you note.

By Kimberly Seville

Here’s what showed up in my mailbox: indicia, 29 percent; First Class meter, 19 percent; presorted First Class stamp, 14 percent; presorted First Class meter, 14 percent; nonprofit Standard stamp, 14 percent; First Class stamp, 5 percent; nonprofit Standard meter, 5 percent.

Of the metered mail, it’s clear that the USPS is on its game with First Class delivery timelines, but it’s taking some nonprofits a month or more to get a thank-you letter in the mail.