1. That may be mailed.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• maiable,
• kailable,
• mzilable,
• msilable,
• mwilable,
• mqilable,
• maulable,
• majlable,
• maklable,
• maolable,
• ma9lable,
• mailble,
• mialable,
• mailbale,
• mailabble,
• mailablee,
• Mailible,
• Maileble,
• Mailleble,
• Mailabele

The adjective form of the word "Mailable" is "Mailable".

The plural form of the word "Mailable" is "Mailables".

The singular form of the word "Mailable" is "Mailable". It is both a singular and a plural form in the English language.