Users can't send emails despite authenticating SMTP

microvax

Well-Known Member
Mar 4, 2021
64
4
8
Lima
cPanel Access Level
Root Administrator
Hello,
We recently moved to a newly installed dedicated server and noticed that some users can't send emails using Outlook unless I add their IPs to both the
Trusted SMTP IP addresses and Bypass all SMTP sender verification checks in EXIM configuration.

When I don't do so, they receive a 0x800CCC0F error message with a 550 code stating that their IP is listed in SPAMHAUS
 

kodeslogic

Well-Known Member
PartnerNOC
Apr 26, 2020
515
242
118
IN
cPanel Access Level
Root Administrator
Does a newly installed dedicated server have the same IP address that you had on the old server? If it is a new IP address on the new server then the users need to make sure their incoming/outgoing mail server in the mail settings (in outlook) is resolving to the new IP address.
 
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