Use Google Smtp Server To Send Email

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Use Google Smtp Server To Send Email – In Gmail, you can send mail not only from your or G Suite email address, but also from any “alias” sender address you’ve configured in your Gmail settings and under “Send Mail.” If you send a mail merge campaign “from” one of these alias addresses, it may affect your email deliverability because your emails cannot be sent through Gmail’s high deliverability email servers.

In the past, you could configure any other address you own to use as the sender address in your Gmail account and have those emails go through Gmail’s servers. Gmail changed this policy a few years ago and now forces you to enter your SMTP server credentials for any new sender addresses not hosted in Gmail or G Suite.

Use Google Smtp Server To Send Email

Use Google Smtp Server To Send Email

For example, I have a domain and one of my old email addresses is [email protected] is not a G Suite domain. I actually run my own mail server for My personal email account is [email protected], so if I wanted to be able to send mail “from” [email protected] to my [email protected] account, I would be forced to enter the SMTP server settings to send mail from [email protected]. email protected] security]

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Gmail made this change in August 2014. With the increased use of SPF and DKIM, Gmail does not allow you to send email through Gmail servers from domains that Gmail does not control. Gmail makes people vulnerable to abuse by allowing people to send any email they want from any domain they want through their email system.

Google changed this. I have a Gmail account, [email protected], and I set [email protected] as an alias sender address in 2012, so I was able to do that and still use Gmail’s servers. I haven’t touched those settings since then… If I want to change anything, I’m forced to the SMTP server.

If you receive a “Permissions” error when trying to add a sender address to your G Suite account, you’ll need to ask your G Suite administrator to change your permissions to allow you to do so. By default, this permission is turned off.

To set up a different non-G Suite sender address in your G Suite account, your G Suite administrator must set permissions to do so.

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Whether or not Gmail asks you to enter an SMTP server when you send mail from a new address depends on the type of Gmail account you’re signed in to and the type of address you’re adding.

If you’re signed in with a G Suite account, which means your account ends up in your organization’s domain and uses Gmail:

Let’s say I now set up [email protected] to send via [email protected] and’s SMTP server is, which I enter as credentials.

Use Google Smtp Server To Send Email

I am setting the sender address to [email protected] and entering the SMTP server information for the domain.

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If I now send a Gmail mail merge campaign from [email protected], those emails will be routed through, not Gmail’s advanced delivery servers. My mail merge may work fine, but I may lose some deliverability benefits. One of the advantages of using traditional email marketing services like Mailchimp or Constant Contact is that Gmail’s own servers have a much higher deliverability advantage than traditional ESP’s servers (known as mass mailing servers).

A third-party SMTP server may not be configured as an express route to handle multiple emails at the same time. Some SMTP servers allow a single user to send a few hundred emails per day. In this case, the amount of emails you can send will be limited not by Gmail’s own limit, but by the limit of a third-party SMTP server. If you start getting bounces not generated by Google, indicating rate limiting or delivery issues, then a third-party SMTP server is throttling you.

If you want to route your email through Gmail’s servers, even when sending “from” an external email address, you can use Gmail’s SMTP relay server, Whether or not you can use and which credentials you use to authenticate depends on your setup.

You can authenticate to with any G Suite account using your G Suite email account and password as credentials. You must have “Allow less secure apps” turned on for this to work.

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To authenticate to using your G Suite email account and password you must enable “Allow less secure applications” for your G Suite account.

If you don’t want to allow “less secure apps”, you can turn on 2-step verification and create a separate app password, as described in the Gmail instructions below. This also applies to G Suite accounts.

As a G Suite user, you also have the option to authenticate with, a special SMTP relay for G Suite users instead of regular Gmail users.

Use Google Smtp Server To Send Email

Unlike G Suite, where regular account emails and passwords are authenticated via if you turn on “Allow less secure apps”, with regular Gmail accounts you need to set up an app-specific password to authenticate via smtp. I think this is a hole in Gmail policy, as I don’t think it was Google’s intention, but it is possible to use as an SMTP server for addresses in and out of the Gmail account. Someone much smarter than me discovered this technique and wrote about it.

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Where you can authenticate to with a Gmail or G Suite account, you can now route your email through multiple accounts in a complex way. For example, in my G Suite account [email protected], I can set up an alias sender address for [email protected] by authenticating to with my regular Gmail account (this is not a G Suite account). Email protected] Confused?

Please note that I am adding [email protected] as a sender address from my [email protected] G Suite account. However, instead of logging into with my [email protected], I use my personal [email protected] account.

I am authenticating to with my [email protected] account. But, the password is not ajaygoel999’s password, it’s a separate app password I made using this technique.

After Gmail tests the SMTP connection and sends me a verification code, I’m ready to send from [email protected] to my [email protected] account.

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[email protected] is set up to authenticate to the SMTP server with the [email protected] account, which of my Gmail accounts will emails be sent from? [email protected] have I set it up, or [email protected], what account will the SMTP server use?

It turns out that these emails will appear in mail sent to [email protected] and [email protected].

Which account actually sent the 3 emails? As expected, the [email protected] account actually sent the email “from” [email protected] because it was the ajaygoel999 account authenticated by the SMTP server. How do we know? A clue can be found by looking at the header of one of the emails received.

Use Google Smtp Server To Send Email

These are the headers of emails received by [email protected] that indicate the email was sent “from” [email protected] via the [email protected] account.

How Using Gmail’s

If you send via a third-party SMTP server, are you subject to G Suite/Gmail sending limits?

If you configure a third-party SMTP server (not to handle emails from new sender addresses, you may think you can now send a large number of emails. After all, why does Google care how much email you send if it doesn’t go through their servers? It turns out that some sending limits were already in place. I plan to do some more testing in our lab in the near future to determine the sending limits when sending through a third-party SMTP server. This will be the subject of a future blog post.

If you are using or as your SMTP server, the restrictions are even more confusing. Note that these two SMTP relays are not intended for use within Gmail. They are intended for use with external devices such as printers and scanners, and external email systems that need to relay email through your Gmail account.

G Suite: Google states a daily limit of 10,000 emails/day for unique recipient emails sent via However, we also know that the sending limit for G Suite accounts is 2,000 emails/day. So the question becomes: If you send mail from your G Suite account through G Suite SMTP Relay, is your limit 2,000 emails per day or 10,000 emails per day? What is the answer? I don’t know, but we will test it in our lab and publish our findings in a future blog post.

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Gmail: Google states a daily limit of 2,000 emails/day for unique recipient emails via However, we also know that Gmail accounts have a limit of sending 500 emails per day. So the question becomes: if you send mail from your Gmail account via Gmail SMTP relay, is your limit 500 emails/day or 2,000 emails/day? What is the answer? Again, I don’t know, but we will test this as well

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