There are many reasons why spam filter think that an email is spam.
1. One criteria that spam filters use to identify spam mail is when the "From:" address of the email uses a domain that is different from the domain of the email server sending that email. All email sent from your Community Weaver will be sent from the email server community.timebanks.org. For this reason it is important to use an email address for your Timebank that has the domain "community.timebanks.org". If you set your Timebank's email to another address please be aware that you will be increasing the likelihood that email from your Timebank to your members will be waylaid by spam filters.
2. If email recipients accept an email from your Timebank once, or for some providers, if the Timebank's email is added to their contact list, then the spam filters will allow all future email from the Timebank will arrive normally. This is also one reason why
it is important to have a new members confirm the email validation that is sent to them.