My emails on my mobile auto delete, the account is set as IMAP. Are they deleting because my pc account and main acount is POP3? Would changing the pc account to IMAP leave them on my phone as well the server?
Under Advanced Settings many POP3 email clients have options; Leave a copy of messages on the server (Y/N) Delete after x days (Y/N - x being a variable you can set) Delete when removed from the Deleted Items folder (Y/N) Have a look in your Account settings and see what you have. Or changing to IMAP would do the trick - but in my experience IMAP can behave badly if the volume of messages on the server grows too large.