I am considering closing an old Yahoo Mail account that I no longer use regularly. Before doing that, I want to make sure I have saved all the important emails and attachments stored in the mailbox. There are several years of correspondence in the account, including personal records, work-related messages, and emails stored in custom folders.

I do not want to lose access to this information after closing the account. I am therefore looking for a reliable Yahoo backup tool that can create a complete local copy of the mailbox. Ideally, it should allow me to save emails in formats that I can open later without needing to sign in to the original Yahoo account.

During my research, I found the SysInfoYahoo Backup Tool, which supports exporting Yahoo mailbox data into formats such as PST, MBOX, EML, MSG, PDF, and CSV. The folder selection and date filtering options also seem useful because I may want to organize the backup according to specific folders or time periods.

One thing I am trying to understand is whether a Yahoo Mail backup tool can preserve attachments, email headers, sender information, and original dates during the download. I would also like to know whether custom folders can be included rather than saving only Inbox and Sent messages.

Security is another important consideration. Since the mailbox contains private information, I would prefer saving the backup directly to local storage. I am also planning to check the downloaded files before making any decision about closing the account.

For those who have archived or closed an old Yahoo account, what steps did you follow to make sure nothing important was lost? Would you recommend creating one complete backup or saving different folders separately? Any practical suggestions would be appreciated.