I use a laptop and desktop computer and an android phone. If I delete from my phone the e-mail is automatically deleted from the other machines. Is there a setting I can use to prevent this please? Thank you.
No you cannot delete from your device and still see it from a laptop. What you can do is create folders from your computer and then move the e-mails you need deleted in there, then leave whatever you need to see from your android in the inbox folder. I hope that makes sense..
You could still see the emails from your computer if you go into the appropriate deleted folder. If you wish not to delete, perhaps there's a better method to organize your emails, such as through labels?
Are we talking about GMail? Microsoft Exchange server? Or, another provider?
If you set up your mail on the phone for IMAP or Exchange access, then your mail will be synched across all platforms; pretty hard to avoid that.
However, if you set up the phone's email client to use POP3 access, then what happens on the phone can remain independent of what happens at your mail server and any other devices (such as your laptop).