Hi, your logs show:
----- On 26 Mar, 2015, at 23:44, @lbutlr krem...@kreme.com wrote: > Mar 26 02:55:38 mail postfix/smtp[7534]: 3lCKqM0QcJzJMnf: > to=<*gmailuser*@gmail.com>, orig_to=<*localuser*.com>, > relay=gmail-smtp-in.l.google.com[74.125.193.26]:25, delay=115, > delays=46/0.02/38/31, dsn=5.7.0, status=bounced (host > gmail-smtp-in.l.google.com[74.125.193.26] said: 552-5.7.0 This message was > blocked because its content presents a potential 552-5.7.0 security issue. > Please visit 552-5.7.0 > http://support.google.com/mail/bin/answer.py?answer=6590 > to review our 552 5.7.0 message content and attachment content guidelines. > b10si4404184igx.11 - gsmtp (in reply to end of DATA command)) So gmail has rejected to accept that message and has put out a *final* message: 552-5.7.0 This message was blocked. Thus the mail was bounced: status=bounced. That is not a "temp failure". So postfix tries to send a NDN to the sender of the blocked mail. > Mar 26 02:56:08 mail postfix/smtp[7534]: 3lCKsQ6KCHzJMnj: > to=<overspill...@akirchheimer.com>, relay=none, delay=30, delays=0/0/30/0, > dsn=4.4.3, status=deferred (Host or domain name not found. Name service error > for name=akirchheimer.com.inbound10.mxlogicmx.net type=A: Host not found, try > again) The MX record of the sender address of the mail that gmail has blocked cannot be resolved in DNS: Host not found, try again. Therefore, the NDN cannot be delivered. That is a "temp failure" and delivery will be retried until the host can be found in DNS or the queue lifetime of that NDN expires. > > Is the NDN being generated because of the gmail temp failure? There is no "gmail temp failure", see above. Hope this helps, wolfgang
