These are email addresses specifically designed by

[hrsibar4405]

A significant portion of your list might comprise individuals who signed up but have since lost interest, changed email addresses, or simply no longer check the email address they provided. These "ghost" subscribers remain on your list, receive your emails, but never open them, diluting your open rate.
Spam Traps: ISPs and anti-spam organizations to identify spammers. They typically have no legitimate users and will never open an email. Sending to spam traps immediately signals to ISPs that your list is unmanaged or acquired illicitly, severely damaging your sender reputation and leading to iran email list future emails being routed to spam folders.
Emails Landing in Spam Folders: If your sender reputation has already taken a hit due to high bounces, complaints, or spam trap hits, your emails may be increasingly filtered into spam or junk folders by ISPs. Emails in these folders are rarely seen, leading to a dramatic drop in opens even if the addresses are technically valid.
Industry Benchmarks vs. Personal Trends: While industry benchmarks provide a general context (e.g., retail might have a higher open rate than B2B), the most critical comparison is your current performance against your historical averages. A consistent downward trend in your own open rates, regardless of where it stands against industry averages, is a strong indicator of a decaying list.
B. High Bounce Rates
A bounce occurs when an email cannot be delivered to the recipient's inbox. High bounce rates are among the most unequivocal signs of a dirty email list, directly impacting your sender reputation and future deliverability. They are categorized into two types: hard bounces and soft bounces.

Definition: The bounce rate is (Total Bounces / Emails Sent) * 100.
Hard Bounces (Fatal): These indicate a permanent delivery failure and are the most damaging.
Non-existent Email Address: The email address simply does not exist at the domain. This is the most common reason for hard bounces and a clear sign of an invalid address.
Typographical Errors: Mistakes made during signup (e.g., gamil.com instead of gmail.com).
Domain Not Found: The domain name in the email address (e.g., example.co in [email protected]) does not exist.