What's My IP
Show the public IP address your traffic appears to come from.
Related Tools
PTR Record Lookup
Reverse DNS — find the hostname an IP address claims. Mail servers check this; missing or mismatched PTR hurts deliverability.
Blacklist Check
Check whether your mail server is on a spam blacklist — being listed is a common reason legitimate email lands in spam.
IP Geolocation
Look up the country, region, ISP, and ASN for an IP address.