Sender Help Center
  • Home
  • Pricing
  • Knowledgebase
  • Log In
  • Get Started
Menu
Sender Help Center
Close menu
Home Pricing Knowledgebase
Log In Get Started
Floating Floating Floating Floating Floating

Knowledge Base

Search
  • Boosting deliverability
  • Campaign management
  • Campaign reports
  • Drag & Drop design editor
  • E-commerce
  • Email Automation
  • Getting started with Sender
  • Integrations
  • Pricing and limits
  • SMS campaigns
  • Subscriber management
  • Subscription forms
  • Terms of service
Knowledge Base
FAQ Contact Us
Home/Knowledge Base/SMS campaigns

Undeliverable

Last Updated: Apr 15, 2025

The recipient’s carrier rejected the message, possibly due to the user opting out of receiving messages from the sender. Further communication may not be possible unless the user opts back in.

Premium capabilities Feels enterprise,
minus the price

All the features your business needs to acquire high-quality leads, grow sales, and maximize revenue from campaigns
using one simple dashboard.

Get Started For Free
Get Started For Free
shape 1
shape 2
shape 3
Sender Help Center
Product
FeaturesAutomated emailsAutomated texting serviceText messaging serviceFree newsletter creatorFree bulk email senderMailto link generatorEmail countdown timerEmail blasterIntegrationsAPIPricing
Resources
Marketing blogEmail campaignsSms campaignsEmail template buildersEmail marketing servicesBulk email servicesCheapest Email MarketingPlatformsSMS marketing servicesMailchimp alternativesBrevo alternativesActiveCampaign alternativesEmail subject lines
Support
Help centerTraining videosMigration serviceReport abuse
Company
Contact usAffiliate programTerms of serviceAnti-SPAM policyPrivacy policyBlog guidelinesBrand assetsSender Academy
© 2012-2025 Sender.net