aeromail - Web-based e-mail client
ilohamail - Light weight yet full featured multilingual web-based IMAP/POP3 client
imapproxy - IMAP protocol proxy
openwebmail - WebMail based on Neomail
postman - High performace web based IMAP and NNTP client
squirrelmail - Webmail for nuts
twig - The Web Information Gateway

#> pkginstall postman
#> dpkg -L postman

tried aeromail 2 from web

#> pkginstall install ilohamail

AeroMail:
http://www.cushman.net/projects/aeromail/index.php

AeroMail 2:
http://www.nicolaas.net/aeromail/