Where did you enter the smtp information? in a script, a field on your database, or the send mail option from the file menu?
The former 2 would need to be referenced from the 'other' database.
The 3rd option (SEND MAIL) just captures the info for the current database unless you have it refer to the other database fields.
i.e. - make global fields in your main db for the info, then point to these field from other databases.
I used the 3rd option (SEND MAIL). For the couple of databases that I might use, that will work. Apparently there is no centralized location for this info, as there is in an email client.