Safe sending limits

Written By John Bromley

Last updated 3 months ago

Sendr applies a safe limit to each connected channel so your accounts stay healthy.

Good to know. These are starting guardrails, not hard caps. You can raise or lower every limit in your channel settings, and Sendr will warn you (but never stop you) if you go above the recommended level. All limits are counted per connected account, not shared across your workspace.

Each channel below follows the same shape: a quick table of the limits we recommend, then how to stay safe.

💌 Email

Email limits protect your sender reputation and deliverability.

Inbox state	Recommended daily volume
Newly connected (default)	15 per day
New or recently connected	15 to 30, building up as it warms
Established and warmed	50 to 100

How to stay safe

Connect several inboxes and use inbox rotation to spread volume and reach higher totals safely.
Warm a new inbox before sending at volume (see "Warming up a new channel" below).
Keep to the standard business-hours schedule so your activity looks natural.

🖇️ LinkedIn

LinkedIn watches for automated-looking activity, so these limits keep your account safe. They are counted per day. The default is what Sendr applies when you connect a LinkedIn channel; the recommended max is the point beyond which you start to risk restrictions.

Action	Default per day	Recommended max per day
Connection requests	15	20
Messages	25	100
Profile views	25	100
Connection checks	25	100

Connection requests are capped weekly, not daily. LinkedIn allows roughly 100 invites per week on Free and standard accounts, and up to 200 per week on Premium or Sales Navigator. Your weekly total is your daily setting multiplied by the days your sequences send, so on a Monday to Friday schedule, 15 per day is about 75 per week, comfortably under the limit.

How to stay safe

Sending seven days a week, adding a connection note, or using a new or low-connection account all lower the safe number, so start low and raise it gradually.
Connection checks are a low-risk status read (they check whether an invite has been accepted), so they do not count toward the weekly invite limit, which is why the default is higher.
Messages to people you are already connected with are treated more leniently than brand-new outreach.

📱 WhatsApp

WhatsApp is a personal, conversational channel, so account health is driven by how people respond to you, not by how many messages you send.

Setting	Value
Default per day (newly connected number)	15
Recommended max per day	40

Your reply rate is the real limit. WhatsApp does not publish a fixed send limit. Replies and genuine conversations build trust, while ignored messages, blocks, and spam reports lower it. A number can be restricted even at low volume if engagement is poor. New numbers carry the least trust and are the most likely to be restricted, so a fresh number sending cold at scale is the fastest route to a block.

How to stay safe

Warm a new number first. Have some genuine conversations on it before you start outreach, and ramp your volume up gradually rather than launching at full pace.
Keep every message personal and conversational. A message that reads like email marketing or a generic blast stands out for the wrong reasons on WhatsApp.
Vary each message so you are not sending identical text to lots of people. You can use Sendr AI to write a different opener for each contact: for example, a Sendr AI step with a prompt like "Write a one-line, friendly opener that references this contact's company and role" gives every message a unique start, which you then insert as a variable in your WhatsApp step.
Send only to a relevant, high-quality list. Messaging people who have no reason to hear from you drives non-replies and spam marks, and that is what actually gets numbers restricted.
Watch your reply rate as your safety gauge. Rising replies mean you can scale; falling replies or spam reports mean pull back.

Warming up a new channel

Coming soon 👀 Sendr will soon ramp new LinkedIn and WhatsApp channels up automatically, raising the daily volume a little at a time.

Until auto ramp-up arrives, ramp manually:

LinkedIn: around 20 connection requests per day in week one, 35 in week two, 50 in week three, then up toward your limit.
WhatsApp: start with a small number of genuine conversations and grow gradually, letting your reply rate tell you when it is safe to send more.

Spreading your sends

Antiburst is on by default 💥 Sending everything in one burst is a common cause of restrictions. Sendr's Antiburst feature spreads each day's activity across your sending window with randomised gaps, so your sending looks natural rather than automated. It is enabled by default on every channel, so you are protected without any setup.

If you need messages to go out sooner, you can adjust this on the sending step itself. Open a sending step (for example a WhatsApp or LinkedIn Send message step), expand Advanced options, and you will find:

Spread sending: spaces that step's sends across your sending window. Turn it off and messages send as soon as they are processed, rather than being paced across the day.
Random delay and Delay range: add a small, randomised gap between individual sends. Turn Random delay off, or narrow the delay range, to send with shorter gaps.

Leaving both on is the safest choice for account health, especially on new or lower-volume WhatsApp and LinkedIn accounts. Only turn them down if you understand the added risk to your sender reputation.

How your sending schedule affects your LinkedIn volume

Your LinkedIn limits are set per day, but LinkedIn's connection-request limit is weekly, so the days your sequences send change your weekly total. By default, sequences send Monday to Friday. If you switch a sequence to send every day, your weekly total rises, so it is worth lowering your daily connection-request limit to stay under LinkedIn's weekly cap. Whenever you change a sequence's sending days, review your channel limits.

Getting good results

Volume is not the goal; accepted connections and replies are. Helpful targets:

Metric	Aim for	Warning sign
Connection acceptance rate	30 to 40%	Below 25% usually means targeting or your invite note needs work
First-message reply rate	5 to 15%	Below 5% usually means the first message is pitching too early

Keep first messages short (under about 75 words) and ask a question rather than pitching.
Personalise the invite note or send none at all. A generic note can perform worse than no note.

Where to set these

You can view and adjust every limit in Settings > Channels, on each connected account, and override them per step inside a sequence. If you are not sure what to use, the defaults above are a safe place to start.

Need a hand? Contact us at [email protected].

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