Setting mail with Cox (or other services with different servers for pop and smtp)

Question

My Cox mail account uses different servers for pop and smtp (my personal ISP 1&1 does too).
The mail applet on my Blackberry Curve 8330 with Verizon does not allow to define different servers for pop and smtp, and further, for SSL smtp mail, the port is fixed at 995 and cannot be changed, while Cox (and 1&1) want to use 587 or something like that.
As a result, I can only receive mail with these services.
I also have yahoo mail, which works fine, so I can send mail with it and it is not a life-and-death situation, but I would like to be able to just reply to email sent to my Cox address.
I called Verizon and they said BlackBerry provides the mail access through their servers and the applet, so there is nothing they can do.
Is there a way to set it such that I can not only receive but also send mail through either of these services?
Thanks in advance,
Didier
PS: Other than that, the Curve on Verizon rocks!!! so much better down here than AT&T it's not even funny.

Answer 1

OK, thank you for the input.
The problem I have with this solution is like the one I have now using yahoo.
There are 2 problems:
1) mailing lists want the mail to come from the account that is subscribed, so if the cox account is subscribed, I can't contribute from the blackberry, and if the blackberry account is subscribed, I don't get my mail in Outlook. Neither is good for me.
2) people who send me mail to the Cox account and get replies from me from the blackberry continue responding to the account that can send from the blackberry (not Cox), and from that point on I do not have that mail on the computer.
The issue of having two copies is no big deal, I just delete the mail I do not need. I would rather have two than none.
Really, Blackberry should modify the email service so that they directly support mail systems like those of Cox and 1&1. I am sure there are others. They should also allow the use of another port for SSL than 995. I have not seen anyone using 995 for SSL.
Until recently, I had a BB provided by my employer, and we had a BES, and that worked really well. I would like to emulate as much of that functionality as possible without having to pay somebody another $10 or $20 a month just for the priviledge of having an account on a private BES server.
Anyway, thanks for the exchange and suggestions.
Didier