Emails Not Arriving? Addresses and Domains to Whitelist

If Grasshopper Signup confirmation emails, reminders, or support replies are landing in spam or getting blocked, here are the exact sender addresses and domains to add to your safe-sender list or ask your IT team to allowlist.

Make Sure Our Emails Reach You

Grasshopper Signup sends a few kinds of email: confirmations after someone signs up, new-response notifications to form creators, scheduled reminders, and replies from our support team. Most people get these with no trouble. But some email providers, and especially locked-down school, church, government, and corporate mail systems, are aggressive about filtering mail from senders they don't recognize, so a message can land in spam or get blocked before it ever reaches the inbox.

If you (or your respondents) aren't receiving our emails, the fix is to whitelist our sending addresses, also called adding them to your safe-sender list, contacts, or allowlist. This page lists every address and domain we send from so you, or your IT administrator, can let them through.

Sections in This Guide

ADDRESSES AND DOMAINS TO ALLOW

These are the exact senders we use. Add the specific addresses to your contacts or safe-sender list, or have your IT team allowlist the domains.

Form emails (confirmations, notifications, reminders)

Domain to allowlist: grasshoppersignup.com

Support replies (handled by AcornReply)

Domains to allowlist: acornreply.com and grasshopper-signup.acornreply.com

WHITELIST IN YOUR OWN INBOX

If it's just your own inbox filtering us, adding our addresses to your contacts is usually enough. The quickest method works in any email app:

  1. Find one of our emails (check your Spam or Junk folder if it's not in your inbox).
  2. Mark it Not spam / Not junk, then add the sender to your contacts or address book.

Provider-specific tips:

  • Gmail: open the message, click the three-dot menu, choose Add [sender] to Contacts list. For stronger control, create a filter (Settings → Filters and Blocked Addresses → Create a new filter) for grasshoppersignup.com and choose Never send it to Spam.
  • Outlook / Hotmail: open the message, click the sender, and choose Add to contacts, or go to Settings → Junk email → Safe senders and domains and add grasshoppersignup.com.
  • Apple Mail / iCloud: tap the sender's name in a message and choose Add to Contacts. Mail from your contacts skips the Junk folder.
  • Yahoo: open the message, hover the sender, and click Add to contacts.

FOR IT ADMINS: ALLOWLIST THE DOMAINS

If a whole organization isn't receiving Grasshopper emails (common at schools, churches, nonprofits, and companies with strict filtering), forward this page to whoever manages your email and ask them to allowlist our sending domains:

  • grasshoppersignup.com
  • acornreply.com
  • grasshopper-signup.acornreply.com

In Google Workspace this is under Admin console → Apps → Google Workspace → Gmail → Spam, phishing and malware → Email allowlist / Approved senders. In Microsoft 365 it's the anti-spam inbound policy → Allowed senders and domains in the Defender / Exchange admin center. Other gateways (Mimecast, Barracuda, Proofpoint, etc.) have an equivalent allowlist or permitted-senders list.

Our messages are sent through a reputable email service with proper SPF, DKIM, and DMARC authentication, so allowlisting the domains above is safe and won't open you up to spoofed mail.

ABOUT OUR SUPPORT EMAILS (ACORNREPLY)

When you contact us through our support page, our replies are handled by AcornReply, the help-desk tool we use to manage support conversations. That's why a reply from our team may arrive from [email protected] or an address ending in @grasshopper-signup.acornreply.com rather than from grasshoppersignup.com. It's still us, just routed through AcornReply so nothing falls through the cracks. Allowlisting those addresses (see above) makes sure our answer to your question actually reaches you.

COMMON QUESTIONS

  • My respondents say they never got a confirmation. What do I share with them? Send them this page and ask them to whitelist [email protected] (or the grasshoppersignup.com domain). That's the address all confirmations and reminders come from.
  • Why does a support reply come from acornreply.com? We use AcornReply to manage support tickets, so replies are sent through their system. It's a legitimate reply from our team.
  • Is it safe to allowlist these domains? Yes. Our mail is properly authenticated (SPF, DKIM, DMARC), so allowlisting our domains only lets through genuine Grasshopper and AcornReply mail.
  • I added the addresses and still don't see emails. What now? Check your Spam/Junk and Promotions folders, confirm the address on file is spelled correctly, then reach out from our contact page and we'll help track it down.