Deliverability Troubleshooting

If you’re finding that your emails are ending up in the spam folder before you’ve sent out to your customers, chances are that your From/Reply-to email address is a Gmail, Yahoo, or another free em...

Overview A Spam Trap is an email address used to find people who are not following best practices or sending unsolicited email. Spam Traps are commonly used to identify senders to filter out of inb...

Why A List Can Get Blocked A list will get blocked by Klaviyo's abuse prevention system if it contains known spam traps, or otherwise a high percentage of “bad” email addresses. A "spam trap" is an...

Hard Bounce vs. Soft Bounce A "bounce" is when an email fails to deliver, or is rejected by the recipient's email server. If your account has a high number of bounces, it can have a negative impact...

Overview If you believe you're experiencing deliverability problems the next step is to determine whether these problems are stemming from sender reputation issues within your control. You can als...

Preview Emails and Gmail Spam Filters Gmail adjusts which emails get caught by its spam filters on a user-by-user basis. This means that Gmail is always learning based on your specific email addres...

A Record These records are used to point a domain or subdomain to an IP address. There may be multiple A Records but they are only able to take an IP address as the value. You can point the same do...

Gmail's Tabbed Inbox Google uses its own complex system to scan incoming emails and automatically sort them. While this sorting process is powered by algorithms that are not made public, as an emai...