I have FPE 2010 installed on my Exchange Edge 2010 servers. We tell users if they want to whitelist users and/or domains to update their Safe Senders (or Blocked Senders) list in Outlook. Then we run a PowerShell commend every night (Get-Mailbox | Update-SafeList). That updates the Safe Senders list on the Edge servers and those senders bypass the spam filtering.
A customer called in today and said e-mails being sent to a distribution group are being blocked by the spam filter. You cannot modify a Safe Senders list for a DL. Furthermore, there is no ByPassAntiSpam attribute for a DL (there is for a user mailbox). I traced the message down in the logs and verified the e-mail is sent to a DL (there are no email delivery restrictions on the DL) and it was rejected due to content restrictions.
SMTPSubmit SMTPAcceptAnySender SMTPAcceptAuthoritativeDomainSender AcceptRoutingHeaders
220 smtpedge.domain.com Microsoft ESMTP MAIL Service ready at Fri, 31 Jan 2014 07:15:02 -0800
EHLO server10.domain.com
250-smtpedge.domain.com Hello []
250-SIZE 31457280
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-X-ANONYMOUSTLS
250-AUTH
250-X-EXPS NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250-XEXCH50
250 XSHADOW
MAIL FROM:<eddie@sendingdomain.com> SIZE=28028
08D0E09CD9D8CFD0;2014-01-31T15:15:03.189Z;1
RCPT TO:<support@receivingdomain.com>
250 2.1.0 Sender OK
250 2.1.5 Recipient OK
BDAT 26632 LAST
Tarpit for '0.00:00:05'
550 5.7.1 Message rejected due to content restrictions
QUIT
221 2.0.0 Service closing transmission channel
Any suggestions for whitelisting senders for DL or bypassing anti-spam for distribution g