Hello, 

as many people we do have problems delivering mail through the Microsoft
MX'es which are used by a lot of company domains. All these domains use MX
records with *.protection.outlook.com or *.prod.outlook.com. 

I am looking for a way to send mail to domains that have such a mx record
through a different transport (for instance through the mailjet service) but
send all other mail the "normal" way. 

As I do not know in advance that a domain is using a M$-MX host, I cannot
put all these domains into the transport table by hand. 

I tried to use a regular expression "/^.*\s+prod\.outlook\.com\.$/" in a
file and then let smtp_generic_maps use it with "smtp_generic_maps =
pcre:/etc/postfix/outlook_mx_patterns"

My plan was to us it as a filter in transport.

The problem is, smtp_generic_maps does not accept reglar expressions. 

 

Any ideas?

Best regards

Norbert Schmidt

 

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