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chumma
Apr 09, 2022
In Questions & Answers
At best, you won't be able to deliver messages to your valid addresses or Buy Email Database determine invalid ones until the block is removed. At worse, your emails will be the subject of a more severe blocking or even permanent blocking at that ISP if you don't take measures. How Sending to Bad Addresses Affects Deliverability Sender reputation is the key factor most ISPs Buy Email Database take into consideration when deciding on the future of your newsletters. Regular sending to invalid email addresses is one of the problems that spoil your sender reputation. The others are spam complaints from recipients and a high bounce rate. Bad email Buy Email Database addresses are monitored by ISPs with the purpose to identify dishonest senders Buy Email Database because it's a common spammer's tactic to send to huge mailing lists without actually taking care if the emails are valid or not. When an ISP sees that a certain percentage of messages from the same sender go to invalid email addresses, it applies a temporary block. The rates that trigger temporary Buy Email Database blocks with ISPs differ. ISPs don't reveal their thresholds in order to make it impossible for spammers to adjust their list size to avoid block. This is the ISP's security measure.
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