[SOLVED] After migration - Unable to send an email to yahoo.com or other domains

[ple]

Hi,
Now that we migrated all user accounts from an old server (mail.domain.com) to the new server (mail1.domain.com). We set a CN name to point mail1.domain.com to mail.domain.com so that users don't have to change the settings in MS Outlook. We are able to send emails internally but not beyond our domain. We receive an error like this: 554 5.7.1 <john.doe@yahoo.com>: Relay access denied.
I've set the Global - MTA - external and internal to the same relay server but that doesn't help. Any suggestions?
Thanks.
PL

[dustys]

Good day!

A couple clarifying questions. Do you use authentication on your outbound SMTP traffic? What are the Trusted MTA networks on your SMTP server used for out going mail? You can find this from:

zmprov gs SERVER_NAME zimbraMtaMyNetworks

Cheers,
Dusty

[ple]

Thanks for quick responding. It shows our company class C ip address range. Can I set up multiple layer of IP ranges?
Thanks.

[dustys]

Ours Looks like the following:

66.115.84.32 54.220.120.0/24 127.0.0.0/8 192.168.0.0/24

The first is an individual public IP, the second is an IP range of public IP's in CIDR, the third is loopback network, and the last is our LAN IP range.

Also, are you having your users authenticate to postfix before they send OR is the IP address they are sending from in the My Trusted Networks?


Cheers!
DJS

[ple]

I manually added our private ranges + the original one into the zimbraMtaMyNetwork list using zmprov ms 'zmhostname' zimbraMtaMyNetworks "ip ranges ip_ranges". Life is good.
Thanks for your help.
PL