Skip to content
Synolink Inbox

Sending Limits

WeChat limits how often an Official Account can broadcast, and how many broadcasts each follower can receive. These limits are set by WeChat, not by Synolink Inbox, so they cannot be raised or reset early.

Sending to all followers: 4 times a month

Section titled “Sending to all followers: 4 times a month”

A WeChat Service Account can broadcast to all of its followers 4 times per calendar month.

  • The count resets on the 1st of every month. Unused sends do not carry over.
  • Broadcasts sent directly from the WeChat Official Account site count toward the same 4. If a teammate sends from there, you have fewer sends left in Synolink Inbox.
  • Once the 4 sends are used, a further broadcast fails rather than waiting for the next month.

WeChat provides no way to look up how many sends remain, so Synolink Inbox cannot show a “2 of 4 used” counter. Keep your own record if more than one person broadcasts from this account.

Each follower receives at most 4 a month

Section titled “Each follower receives at most 4 a month”

Separately from the send count, one follower can receive at most 4 broadcasts in a calendar month.

This matters for contact-list sends. If some of the people you selected already received 4 broadcasts this month, WeChat skips those people. The broadcast still completes successfully — it simply reaches fewer people than you selected.

Both limits as written in WeChat's documentation: four all-follower sends per month, and four received messages per follower per month.

Both rules, quoted from WeChat’s group message guide. “is_to_all true” is the All Followers option; “is_to_all false” is a contact list.

A contact list needs at least 2 recipients

Section titled “A contact list needs at least 2 recipients”

A contact-list broadcast must have 2 or more recipients. WeChat has no broadcast path for a single person, so Synolink Inbox stops you from saving with only one recipient selected.

To reach one person, reply in the Inbox conversation instead.

The recipient parameter in WeChat's API reference, requiring at least 2 OpenIDs and at most 10000.

The recipient field, quoted from WeChat’s massSend API reference.

Contact list on overseas Official Accounts

Section titled “Contact list on overseas Official Accounts”

If your Official Account is registered outside mainland China, the contact list option is unavailable and only All Followers can be used. WeChat rejects contact-list broadcasts sent from an overseas account.

WeChat allows overseas Official Accounts to send only article-type (mpnews) messages, and Synolink Inbox does not offer that message type. Sending to all followers is not affected and works with text and image as usual.

WeChat's note that overseas Official Accounts support only mpnews messages.

The restriction, quoted from the notes of WeChat’s massSend API reference.

Set Account region in the broadcast form to match your account. Choosing International disables the contact list option and shows a note in its place.

Where these limits come from

Section titled “Where these limits come from”

These are WeChat’s own rules, documented for developers:

  • Group message guide — the monthly send limit and the per-follower receive limit
  • massSend API — the minimum recipient count and the overseas account restriction