On 1/12/2017 4:09 πμ, Rodrigo Cunha wrote:

Change This:

mynetworks = 195.251.204.0/24 <http://195.251.204.0/24>, 195.251.202.0/23 <http://195.251.202.0/23>, 194.177.194.0/23 <http://194.177.194.0/23>, 127.0.0.0/8 <http://127.0.0.0/8>, 10.201.0.0/16 <http://10.201.0.0/16>, [2001:648:2011::]/48, 83.212.5.24/29 <http://83.212.5.24/29>, [2001:648:2ffc:1115::]/64, 62.217.124.0/29 <http://62.217.124.0/29>, [2001:648:2ffc:126::]/64

change that for this

mynetworks = 127.0.0.1/8 <http://127.0.0.1/8>, 195.251.204.0/24 <http://195.251.204.0/24>, 195.251.202.0/23 <http://195.251.202.0/23>, 194.177.194.0/23 <http://194.177.194.0/23>, 127.0.0.0/8 <http://127.0.0.0/8>, 10.201.0.0/16 <http://10.201.0.0/16>, [2001:648:2011::]/48, 83.212.5.24/29 <http://83.212.5.24/29>, [2001:648:2ffc:1115::]/64, 62.217.124.0/29 <http://62.217.124.0/29>, [2001:648:2ffc:126::]/64

Thank you Rodrigo,

As you can see, 127.0.0.0/8 is already included.

However, I tried adding [::1]/128 (which I noticed was missing) and this time it worked!

It seems that even though I have explicitly permitted ::1 in localhost.cidr ( check_client_access in smtpd_recipient_restrictions ), I MUST ALSO include it in mynetworks, although I don't use permit_mynetworks!

Obviously, this is due to the implicit (default) setting of:

smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination

Things are working OK now, thanks everyone!!

Cheers,
Nick

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