Allegrow doesn’t just help the emails that you send land in the primary inbox. We also stop you from sending emails which will harm your sender reputation with our new Safety Net module.
The Safety Net analyzes each email that’s scheduled inside your sales engagement platform and reverts risky emails to drafts. This allows you to prevent bounces, blacklisting and manual spam reports on your emails.
You’ll then have the opportunity to analyze each email the Safety Net catches and take appropriate next steps with enhanced email deliverability.
We now live in a world where for your entire company, the emails you chose to not send are just as valuable as the ones you do!
Therefore, without a safety net which has your back and helps catch bad data or risky contacts that slip into outbound email processes, the deliverability of your entire company is put at risk.
In this guide, we’ll outline:
What is a bounce
An email bounce is when your message was either rejected or could not be delivered to the recipient's mail server. Hard bounces are when an email has permanently failed to deliver to a server, whereas a soft bounce indicates future delivery may be possible.
Here are some examples of common types of bounces:
Hard Bounces:
- 5.1.0: Something about the address specified in the message caused this Delivery Status Notification.
- 5.1.1: The mailbox specified in the address does not exist.
- 5.1.2: The destination system specified in the address does not exist.
- 5.1.3: The destination address was syntactically invalid.
- 5.1.4: The mailbox address as specified matches one or more recipients.
- 5.1.6: The mailbox address provided was at one time valid, but now it is not.
- 5.1.8: The sender's system specified in the address does not exist.
- 5.2.0: The mailbox exists, but something about the destination mailbox caused the sending of this Delivery Status Notification.
- 5.7.1: Often seen when the email has been blocked by the recipient's email security system, due to content appearing similar to spam, or being in a group explicitly blocked by the recipient.
Soft Bounces:
- 4.2.2: The mailbox is full because the user has exceeded a per-mailbox administrative quota.
- 4.3.1: Mail system storage has been exceeded.
- 4.3.2: The host on which the mailbox is resident is not accepting messages. Sometimes seen when a server has taken action to protect against spam or other email abuse.
- 4.4.1: The outbound connection attempt was not answered. This can sometimes happen if the recipient's email server has been blacklisted due to spam.
- 4.4.2: The outbound connection was established, but was unable to complete the message transaction.
General Bounces:
- 5.5.0: Something was wrong with the protocol necessary to deliver the message to the next hop. This catch-all error sometimes includes spam-related bounces, but would usually include more specific information in the bounce message.
- 5.5.1: A mail transfer protocol command was issued which was either out of sequence or unsupported.
- 5.5.2: A mail transfer protocol command was issued in such a way as to be malformed.
- 5.5.3: More recipients were specified for the message than could have been delivered by the protocol.
A small number of bounces can be expected in day-to-day operations; however, when you conduct outbound sending, the risk profile of producing bounces that will hurt your sender's reputation drastically increases.
Why your Current Process puts Deliverability at Risk
Your team will regularly source emails of contacts at accounts you’ve assigned them, then add these contacts to your sales engagement software to conduct an outbound sequence.
Inevitably, regardless of the internal best practices and data provider, risky contacts find their way into your outbound sequences. Then when outreach emails from your users' mailboxes and company domains are sent to these emails, bounces are produced.
As these bounces pile up over time and are produced at a higher rate than average by your domain, this sends a signal to email providers that you don’t know the contacts you’re reaching out to and are conducting risky email behavior. Therefore, the future inbox placement of your domain and mailboxes will be impacted - meaning more of your emails get delivered to the spam folder or get blocked.
The average bounce rate on automated emails across all industries is 0.40%, while specifically outbound campaigns usually have a higher bounce rate. Benchmarking from Outreach suggests a bounce rate of over 2.8% indicates it’s highly likely your emails are being flagged as spam.
To help neutralize the risk outbound sequences pose to your email reputation, an email safety net acts as a final line of defense against risky contacts being messaged and hurting your domain.
How to use our Email Safety Net (in 3 Steps)
Rather than conduct basic data verification on email contacts on a periodic basis, the Safety Net dynamically checks contacts moments before your emails are about to be sent, preventing slip-ups.
This means the Allegrow Safety Net has your back and protects your team's deliverability, so you can focus on prospects rather than analyzing your contacts for deliverability risk.

There are three core steps to the Safety Net’s process:
Step 1: Every contact which gets scheduled inside your sending software will be checked shortly before it gets sent to.
Step 2: While analyzing each contact, if we detect the recipient is too risky. We’ll revert the email back to a draft so it doesn’t get sent to or enter your sequence.
Step 3: Then we’ll notify your team/rep, showing them the reason sending was prevented. This allows you to take the best possible next step while maintaining high deliverability.
Potential steps you might take after notification a contact was caught by the safety net are; selecting a different contact at the same account to prospect, or reaching out to the prospect through a different communication channel.
*Remember - In order for your traffic to be run through the Safety Net, you'll need to have a small delay set inside your sequence steps of 2-minutes minimum so we have time to conduct analysis on the email and revert it to draft (if necessary). To make sure this is in place you can check your sequence steps like this:

If you need to add a delay, select 'Editing step' - then proceed to set 'After a set amount of time' as the option for the sequence, and fill 2-mins as the minimum delay:

On the other hand, if you're sending an email directly from Outreach rather than through a sequence and want it to be run through the Safety Net, select the 'Send later' option once you've complete your draft and schedule the email for at least 2 mins in the future:

What analysis the Safety Net conducts
The Allegrow Safety Net connects to your sending software and conducts analysis to identify the contacts you are about to reach out to, that could hurt your sender reputation.
When we detect a high-risk email inside your sending schedule, we’ll revert the email back to a draft, so that automatic sending does not occur. While conducting this analysis, we look to evaluate multiple aspects of each email contact. This includes but is not limited to, the following areas:
- If the recipients' mail email server is operational.
- Syntax of the email address.
- Data sources that suggest the address may have a history of producing bounces.
- If the contact is a secondary or primary email address.
- If the recipient has a track record of manually reporting or blacklisting mail.
- If the email being contacted is a ‘spam trap’.
- When was the last known engagement the recipient email had with incoming emails.
The safety net cannot reduce your bounce rate to zero - however, it can help as a final line of defense to remove risky contacts from your outbound email flow.
Compatibility & Email Safety Net Set-Up
For the Safety Net to start working on your Allegrow account you’ll need to connect Allegrow to your sales engagement platform and have the mailboxes which conduct sending in your sales software, also connected to your Allegrow account.
Instructions on setting up the Safety net in your Allegrow account are available here.
Currently, the Safety Net is compatible with Outreach.io as a sales engagement platform. You can find Allegrow as an approved integration on the Outreach here:

If you use a different sales engagement / sending software that you’d like to connect to the Safety Net - Don’t Worry, we’ll be adding more integrations very soon. But, if you’d like the one that matters to you most to be prioritized, please let us know by filling out this survey.