Using anti-spoofing and Mandrill [message #146571] |
Mon, 09 September 2019 19:22  |
macjimbo
Messages: 60 Registered: June 2008
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I've recently started using Mandrill for sending transactional emails to our customers and staff. The emails are addressed so that they are sent from name<_at_>ourcompany.com
We still continue to use Kerio Connect 9.2.10 for all other email sending and receiving for our company.com
This all works fine except when the Mandrill recipient is within our organisation (ie person<_at_>ourcompany.com)
Because I have sender anti-spoofing protection turned on (to stop outside organisations sending email pretending to come from us), the mail sent from Mandrill is blocked:
[09/Sep/2019 17:34:36] SMTP: Message from IP address x.x.x.x was rejected because of missing authentication for local domain sender <name<_at_>ourcompany.com>.
Because Mandrill uses an ever-changing IP address range, I can't simply add their IP address range to the whitelist - so right now the only option I can see is to turn off the anti-spoofing protection.
Has anyone got any ideas how to work around this?
Thanks!
[Updated on: Mon, 09 September 2019 23:18] Report message to a moderator
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