::T-Online ::POLIfórum

IP address to check

Use your ISP's mail relay

EXPLANATION:

T-Online Hungary maintains an internal list, consisting of DNS names. This list contains domain prefixes, which belongs to your internet service provider's dynamic address pools. Connection attempts from these will be dropped without further processing.

SOLUTION:

As the message says, use your provider's mail gateway (smarthost, mail relay, etc). Typically it's in the form of: mail.ISPNAME.TLD.

If you think that this check is not correct and we should modify your domain's status, please contact postmaster@t-online.hu.