dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=c*****s.com

mailgun_login:
driver = plaintext
public_name = LOGIN
hide client_send = : postmaster@c*********t.com :
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

mailgun:
driver = manualroute
domains = ! +local_domains
transport = mailgun_transport
route_list = "* smtp.mailgun.org::2525 byname"
host_find_failed = defer
no_more

mailgun_transport:
driver = smtp
hosts = smtp.mailgun.org
hosts_require_auth = smtp.mailgun.org
hosts_require_tls = smtp.mailgun.org

mailgun_login:
driver = plaintext
public_name = LOGIN
hide client_send = ": ${extract{login}{${lookup{$sender_address_domain}lsearch{/etc/exim_mailgun}{$value}fail}}} : ${extract{password}{${lookup{$sender_address_domain}lsearch{/etc/exim_mailgun}{$value}fail}}}"

mailgun:
driver = manualroute
domains = ! +local_domains
transport = mailgun_transport
route_list = "* smtp.mailgun.org::587 byname"
host_find_failed = defer
no_more

mailgun_transport:
driver = smtp
hosts = smtp.mailgun.org
hosts_require_auth = smtp.mailgun.org
hosts_require_tls = smtp.mailgun.org

domain1.com:    username=postmaster@mg.domain1.com     password=abcdefghi
domain2.com:    username=postmaster@mg.domain2.com     password=jklmnopqr