You have to know this. Especially if you do email outreach. Each host has its own email sending limits. The limits may be daily, hourly, and sometimes also per minute. If you’re sending cold email campaigns without being aware of your email provider’s limits, your email account may get blocked before you know it. In this article, you will find information about sending limits of popular email service providers including Gmail, Office 365, GoDaddy and more.

Why is it crucial to be aware of the limits?

If you’re sending your cold emails using Alore CRM, which sends the emails from your own mailbox (your own SMTP), the limits of your email service provider are the ones to keep an eye on when setting up your cold email campaigns.

Sending too many emails a day (or sometimes even too many an hour, or a minute) may cause your email account to be blocked, i.e. you won’t be able to send any kind of email from your account for 24 hours or more.

If you know the limits, and set up your delivery time and the number of emails sent daily per campaign according to those limits, your campaigns will be smoothly sent as planned – provided that you’re not sending poor quality content without any personalization whatsoever. If you’re sending spam or anything that is considered spam by your recipients, you will get blocked anyway and probably sooner than you reach your daily limit. Remember: the deliverability of your emails is also crucial if you want to avoid being blocked.

The limits posed by your provider are for all the messages getting out of your address. That’s why if you have several follow-ups planned within your campaign, you should keep in mind that after a few days or weeks, there will be not only your first touch emails queued to be sent a day but also a number of follow-ups. As all the scheduled types of emails overlap, the limits may be easily exceeded. The same goes for sending a few campaigns from the same email address at the same time.

What are the limits?

We have included the information that we found through our research. However, the limits may change with time. So it’s crucial to go through the direct resources to make sure you get updated information.

Jump straight to your provider:

  • Free Gmail
  • G Suite (Google Apps for Business)
  • Office365
  • GoDaddy
  • Rackspace

Free Gmail

Daily limit: 500 messages
Hourly limit: There is no official information. However, it’s good to send no more than 20 messages an hour from a free Gmail account.

Additional good-to-know: If you exceed the limits, your account will get blocked for 1-24 hours. We usually don’t recommend sending cold email campaigns from a regular free Gmail account but setting up an address on a separate domain using G Suite (a business email service from Google) instead. This gives you greater opportunities as to the outreach volume and more control over your sending settings.

Plus, your recipients will definitely treat you more seriously if they get an email from an address including a business domain, rather than from So if you do decide to use free Gmail account for your outreach anyway, make sure the address looks safe and legit to your recipients. 

What’s most crucial to keep in mind, however, is that controlling the quantity of your outreach is one thing, but there’s also the quality to take care of. If you send poor quality cold emails with no personalization to a bunch of non-verified addresses, your provider may block you even before you hit the quantity limit. Especially if your provider is Gmail. So bear in mind that quality is even more important than quantity in this respect.

Direct resource: Limits for sending and receiving mail for free Gmail accounts >>

G Suite (Google Apps for Business)

Daily limit: 2000 messages (500 on trial)
Hourly limit: Officially, there are no hourly limits.

Additional good-to-know: If you exceed the limits, your account will be blocked for up to 24 hours.

Just like in the case of a free Gmail account, the quality of your messages is tremendously important for deliverability, and poor deliverability may cause your account to be blocked before you even reach the quantity limit. So, if you get blocked even though you send a limited number of messages, check your email copy for spam words, broken links, HTML-to-text rate, and lack of personalization.

If Google’s anti-spam mechanisms find anything that may suggest your emails may be spam, you will get blocked. It makes a lot of sense if you think about it: one of the most effective ways to prevent spam from getting into people’s inboxes is preventing people from sending spam in the first place.

Direct resource: Gmail sending limits in G Suite >>


Daily limit: 10,000 recipients,
Hourly limit: There’s no hourly limit, but a limit per minute, which is 30 messages max.

Additional good-to-know: If you take your outreach seriously, you won’t even get close to the daily limit of Office 365. 10K per day sounds ridiculous for quality email outreach. But, be aware of the limit per minute, especially if you use some automation to send your outbound campaigns.

Just as in the case of other providers, poor deliverability of your emails may result in getting blocked before you reach the sending emails. It’s really more important how many of the emails you send actually gets to your prospects’ inboxes. If the delivered/sent ratio is low, you look like a spammer and you may get blocked because of that. 

Direct resource: Exchange Online Limits, Office 365: Receiving and sending limits >>

GoDaddy (Workspace email accounts)

Daily limit: 500 recipients,
Hourly limit: max. 300 messages per hour; max. 200 messages per minute

Additional good-to-know: It’s quite easy to hit the daily recipients limit if you send a few campaigns with follow-ups using automation. So if you do send a few campaigns with follow-ups, make sure to schedule the messages within all your campaigns for various days of the week. Or use more than one email address to make sure your first touch emails and follow-ups won’t overlap in a way that will get you blocked from sending.

Be smart when setting the delivery hours for your messages, though. If you set a single-hour window and decide to send your campaign to more than 300 prospects, you’re getting dangerously close to the hourly limit of GoDaddy.

Direct resource: GoDaddy Workspace email account limitations >>


Daily limit: 10 000 recipients/24h, but “automated email and spam are restricted at much lower limits to protect the integrity of the system.”
Hourly limit: No official information about an hourly limit.

Additional good-to-know: Rackspace pays attention to the quality of your messages more than to the quantity of them. Don’t get easily misled by the 10K daily limit. If you’re sending emails of low quality using Rackspace, you’ll get blocked much much sooner than that.

Remember that it’s very much about how many of your emails actually get to their destination. If they are classified as spam, either by anti-spam filters, or what’s worse, by your prospects, you may be blocked after just a few hours from hitting ‘send’.

Direct resources:

Again, I know there are many more email service providers, and I’ll gladly include them here if you let me know which one you use.

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