Where companies route incoming email
Share of tracked web domains by the provider named in their preferred mail exchange (MX) record.
Snapshot
- Proofpoint
- 44%
- Microsoft
- 25%
- Mimecast
- 5%
- Cisco
- 8%
- Symantec
- 1%
- Other / unavailable
- 17%
Method and provider mappings
Each point uses the last available snapshot of the month for a historical index sample. Missing months leave a gap. Shares are rounded to whole percentages that add up to 100%. Other / unavailable includes unlisted providers, missing records, and conflicting results. An MX record shows the first stop for incoming mail, which can be a security gateway in front of the mailbox host.
- Proofpoint · pphosted.com, ppe-hosted.com, gpphosted.com, ppops.net
- Microsoft · Exchange Online mail hosts under outlook.com and mx.microsoft
- Mimecast · mimecast.com and regional gateway domains
- Cisco · iphmx.com
- Symantec · messagelabs.com, part of Broadcom since its 2019 acquisition