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However, an unsubscribe rate can certainly be too. High and have a negative impact on email deliverability. If mailbox providers see. That lots of people don’t want to hear from you anymore. That’s a signal that you may be acting like a spammer. It’s not uncommon to see a few […]

Enforcing email authentication supports email deliverability because it gives mailbox providers a strong signal that your messages are safe and legit. Sender Policy Framework (SPF) No, this isn’t sunblock. An SPF record is a list of domains and IP addresses that are approved to send mail on your behalf. When […]

Get more information on blocklist removal from our friends at Mailgun. Email authentication failures One of the biggest threats to email security is phishing, which includes a tactic known as brand spoofing. This is when a bad actor tries to impersonate a recognizable brand using fake messages that appear real […]

It’s worth noting that, even if you end up on blocklist.  It’s still up to the receiving mail system to decide if your messages get delivere or block. Here’s how Spamhaus explains it. Does not tell a 3rd-party mail system what to do with an item of email. The 3rd-party […]

But keep in mind that mailbox providers and system admins can. Adjust the settings to be higher or lower as well as choose the specific checks they want to run. When Email on Acid runs a SpamAssassin test during deliverability checks. We use the default score of “5” to provide […]

So, recycled spam traps aren’t as serious as pristine spam traps. But they can still hurt email deliverability. If you continue sending emails to a recycled spam trap, this could eventually get you added to a blocklist or cause your emails to land in the junk folder. Plus, if those […]

Spam traps If you’ve bought a list, rented one. Or scraped the internet to gain contacts. There could be imposter email addresses hiding in your list. That’s because mailbox providers and other entities plant traps to catch potential spammers. And if you built your list in a shady way, you […]

That’s because even the emails that landed in spam were technically delivered. As long as the message didn’t bounce or get blocked, it counts toward the delivery rate. You should aim for a delivery rate of 95% or higher. For comparison, users of Mailgun by Sinch have an average delivery […]

Other reasons for a hard bounce include: Fake email addresses. Typos in email addresses Nonexistent domain name in the email address Invalid emails from a purchased list If you have a high number of hard bounces, it could lead to getting blocklisted, which is something we’ll address later. If you […]

Email deliverability focuses on methods that help messages land in the inbox rather than. Being blocked or filtered into spam folders by mailbox providers. The mailbox providers or inbox service providers (ISPs). Which include Gmail, Outlook, Yahoo Mail. Apple Mail are the main gatekeepers. If they don’t trust you as […]