Is MAILS a Wordle Word?

Yes. MAILS is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

Plurals ending in S are almost never chosen as Wordle answers.

What does MAILS mean?

/meɪlz/

A bag or wallet.
A bag containing letters to be delivered by post.
The material conveyed by the postal service.“Don't forget to pick up the mail on your way.”

5 more noun definitions

A stagecoach, train or ship that delivers such post.
The postal service or system in general.“He decided to send his declaration by mail.”
The letters, parcels, etc. delivered to a particular address or person.
Electronic mail, e-mail: a computer network–based service for sending, storing, and forwarding electronic messages.
A trunk, box, or bag, in which clothing, etc., may be carried.

(ditransitive) To send (a letter, parcel, etc.) through the mail.
(ditransitive) To send by electronic mail.“Please mail me the spreadsheet by the end of the day.”
To contact (a person) by electronic mail.“I need to mail my tutor about the deadline.”

Armour consisting of metal rings or plates linked together.
A contrivance of interlinked rings, for rubbing off the loose hemp on lines and white cordage.
Any hard protective covering of an animal, as the scales and plates of reptiles, shell of a lobster, etc.

1 more noun definition

1 more noun definition

Definition from Wiktionary, available under the CC BY-SA license.

Starter word rating: AverageIn the top 25% of all valid Wordle words for testing common letters.
Vowels: A, I
Unique letters: 5 of 5
Common letters: A, I, L

Hard-mode trap: 13 valid words fit the pattern _AILS. If you reach it, you may need several guesses to find the last letter.

Letter ratings use how often each letter appears in Wordle answers.

Tap its tiles to the colours Wordle showed, and the Wordle Solver lists every word that still fits, with the best next guess.