On 03.08.20 15:25, Asai wrote:
We've had some trouble over the years with iOS clients not being able
to connect to our Postfix server until a reboot of the mobile client
takes place.
In trying to upstep our general security, we're trying to implement
some of the recommendations on this list:
https://access.redhat.com/articles/1468593
It seems like the bulk of this is in raising the encryption on SMTP
delivery.
One question I have is, if we implement some of these settings like,
tls_auth_only, or tls_mandatory_protocls to exclude SSLv2 and SSLv3
will this break iOS (or any other) mobile operability?
Or, does anyone have any better general guidelines for hardening Postfix?
to allow clients you should enable ports submission (587) and submissions
(465) in master.cf.
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