Has your email list not been updated for years? According to Hubspot, email lists decay by 22.5% each year. This means that if you don't keep adding new email contacts, your marketing effectiveness will be greatly reduced. It is very important to keep your email list updated and clean. Regularly cleaning up invalid email addresses and removing those uk phone numbers list no longer valid contacts from the list can increase the open rate of your emails. Invalid contacts are not only unhelpful for marketing, but also drag down your email delivery rate and may even cause emails to be marked as spam.
There are a number of reasons why email marketers often have their emails marked as spam. Sending single image emails is a common problem, as ISPs cannot read the content of these emails and often mark them as spam. Frequently sending fluff or using purchased mailing lists can also increase the risk of being marked as spam. Additionally, some email addresses may have been marked as mail traps by organizations such as Spamhaus, further increasing the likelihood that your emails will be marked as spam. Ensuring that your email content is valuable, avoiding the use of purchased mailing lists, and regularly checking your mail server for blacklists can all help improve your email deliverability.