I think i found the problem, but will only be sure a bit later, when i see that the bounced does not climb to more that 333.

This is a sugarbug. When importing a contactss,account,lead and it has only one email it should mark that mail as primary, when there is more that one the eldest,first should automtically be set as primary.
When i looked at the backend, database. i saw that a lot of the mails, that was the only mails, was not marked as primary.I updated the database and now it looks to be running smoothly. will know more in an hour.

All these contacts were imported via sugar