After the upgrade, we can not sent email to our 1000 members.
We are loyal customer. Before, we upgrade our system. we are able to send the email to our over 1000 members ( we divided to 8 groups, therefore, we need to send the emails 8 times) within 30 minutes without any delate. After we upgrade the system, we can only send 150 emails. If I am not busy, I can divided to 4 days. Sometimes , I am very busy, I will have no time to do so. Please solve this problem for us. Thank you very much!
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hwahsia said
We are loyal customer.
Thunderbird is a free e-mail program. To be a "customer", you would have had to pay for the program.
If you did pay for Thunderbird, then you have been scammed: https://support.mozilla.org/en-US/kb/avoid-and-report-mozilla-tech-support-scams
After we upgrade the system,
What "upgrade" are you talking about? To your company servers? To your company computers? To just Thunderbird on one computer?
Important! Sending one e-mail to many people using any regular e-mail program can be interpreted by e-mail servers as spam. E-mail servers usually will not allow more than a certain number of receipts for a single e-mail. How many recipients will depend on the policies of the company running the server.
Companies who send out the same e-mail to many people should set up other e-mail arrangements than use a regular e-mail program like Thunderbird.