Mail out
Definition 1 of 2
Pro Tip 1/3Time-sensitive
Used when sending something important that the recipient needs soon. 
Remember to mail out the contract today so they'll get it by the deadline.
Pro Tip 2/3Physical Items
Refers to sending tangible items, not electronic ones. 
Don't forget to mail out the samples to our clients.
Pro Tip 3/3Personal Impact
Personalized mail-outs can show care and attention, adding a personal touch. 
I'll mail out thank-you cards to the team with handwritten notes.