[I posted this in the Off-Topic by mistake. Please accept my apologies]
I have a portable secure e-mail application for WinXP platforms.
This application is free for personal use and requires a simple registration.
It uses RSA 8192 bits and AES 256 bits encryption and all secure e-mails are automatically signed.
It supports all types of POP3 accounts and web-mail as well.
More info can be found from
[Self Promotional Link Removed by Moderator - As you posted it 3 times in close proximity, this is your final warning. If you post something self promotional again, you will be banned.]
Best rgds
https://portableapps.com/forums/guidelines
No Self-Promotional Posting - Posting about your own software or websites in an online forum is a form of spamming and is not permitted here. If you make a self-promotional post, it will be editted and your account may be disabled.
Vintage!