On 5/13/19 12:11 PM, dan...@pyranah.com wrote: > Does anyone have contacts at Charter (Spectrum) and Cox? For some reason, > our IP has been blocked by them and our customers are unable to send email > via their charter/cox accounts. Thanks
Would you be talking about port 25/tcp outbound? Lots of ISPs will block port 25 as a rule; you have to call to have it opened. At the same time, you can request the PTR record you need to keep big mail receivers happy.
