For your email communications this is a problem as you could continue to send them messages through your email marketing platform. Whichever app you use, it won't tell you that the address is no longer active. So one of the best email marketing tips is to clean up your lists from time to time.
Itheir contact list, but how often should this be done? Regularly checking brazil telegram database for outdated contact information to flag its update should be something you should always do. However, the main issue is that data corruption is a constant problem and sometimes harder to detect than you might realize.
For example, a contact might create a new email address but keep the old one active. Hopefully they've set up forwarding so they still receive all the emails you send, but there's no guarantee of that. Overall, the numbers show that on average, an email list will degrade by over twenty percent annually.