[sieve][regex] Matching multiple strings in the "Received" header

[Adi Pircalabu]

On 08-05-2018 2:43, Benny Pedersen wrote:
> Adi Pircalabu skrev den 2018-05-07 05:10:
> 
>> How should I write it to also match the space character at both the
>> beginning and end of the expression?
> 
> use \ before space char

Tks. Just tried these two, unsuccessfully:
"\.from.*(outbound.protection.outlook.com|.google.com|.yahoo.com|mx.aol.com)\."
"\ 
from.*(outbound.protection.outlook.com|.google.com|.yahoo.com|mx.aol.com)\ 
"

However, this expression always matches:
"from.*(outbound.protection.outlook.com|.google.com|.yahoo.com|mx.aol.com)"

What am I missing?

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Adi Pircalabu