E mail access from different places?

Got an internet/e mail account from Provider A.
pop.xxx.nl - normal - port 25
smtp.xxx.nl - safe to specific port TLS - port 995
Works fine at my home.

Got a cottage with an internet account from Provider B.
pop.xxx.nl - normal - port 25 - works OK
smtp.xxx.nl - does not work whatever I try: other ports, other smtp settings etc.
Saw a msg flash by about first having to login.
But the software should do that automatically...

Does this mean I cannot address A through B?
Webmail works OK to A of course, but I prefer using the same e mail software (The Bat!).

Anyone?

For me, I expected it to work as for you...
After a lot of trying I finally found something that works:

entry is smtp.xxxx.nl
clicked the box next to it "authentication"
new screen opened
checked the box "execute SMTP authentication (RFC2554)"
checked the box "use specific settings"
then I could enter user/password
OK
Now the entry " smtp.xs4all.nl" has changed to "smtp.xs4all.nl / user = XXXX"

Dunno why this did the trick,but I'm glad my worries are over !