==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- Related log if you're reporting an issue:
================ Required information ====
- iRedMail version (check /etc/iredmail-release):  0.9.5-1
- Linux/BSD distribution name and version:  centos 7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? NO
- Related log if you're reporting an issue:

Hi, a lot of our customers which have e-mail accounts on our server want to use MailChimp along with our services. This causes several issues - if example email contact@domain.pl exists on our iredmail based server and the domain contains both our and mailichimp SPF records it causes message dropping with an error "Sender address rejected: not logged in" .  As there are many companies that provides bulk e-mail sending on the same basis it causes this problem very significant. Could you please provide us with solution or point us in the right direction to resolve the issue?