Solutions Message has 26 entries with similar clues

• 3-letter words
• inkInvisible ...... (medium for a secret message)
• mmsinitialism for a multimedia text message
• smstext message sent to a phone
• 4-letter words
• cardeccentric message
• textMobile phone message
• 5-letter words
• alertWarning message
• emailDigital message
• 6-letter words
• e-mailComputer message
• letterNote or message
• 7-letter words
• speedosInstruments sending sound up in urgent message
• telexedSent a message
• tweeterPoster of short message
• 8-letter words
• noteletsPretty folded sheets for short messages
• prophecyDivine message of what is to come
• apologueFable with a moral message
• 9-letter words
• cablegramUrgent message
• valentineMessage for February 14
• headstoneits message is a grave one
• 10-letter words
• skywritingMessages created by planes
• errand-boyLad delivering messages, etc.
• understandGet the message
• 11-letter words
• emailblastsWide-reaching messages that are often ignored
• 14-letter words
• despatch-riderOne carrying messages by motorcycle
• dispatch-riderOne carrying messages by motorcycle
• bulletin-boardWhere messages are pinned
• 15-letter words
• refer-to-drawerMessage on bouncing cheque