Symantec MessageLabs email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Symantec MessageLabs is the mailbox provider for 521 domains — 0.08% of 675,489 domains with MX records. Its strongest TLD is .com (42.6% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What Symantec MessageLabs represents in this dataset
Broadcom Symantec hosted email security.
Directory category: Gateway. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-24 snapshot shows about Symantec MessageLabs
Across 65 distinct TLDs its top three are .com (42.6%), .co.jp (7.7%), .co.uk (6.3%) — together 56.6% of the 521 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Salesforce (ESP, 44 domains, 8.4% of them), followed by Amazon SES (7.7%). Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-24); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with Symantec MessageLabs
What else the same 521 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of Symantec MessageLabs users |
|---|---|---|---|
| ESP | Salesforce | 44 | 8.4% |
| ESP | Amazon SES | 40 | 7.7% |
| ESP | SendGrid (Twilio) | 31 | 6.0% |
| ESP | Mandrill | 25 | 4.8% |
| ESP | Mailchimp | 21 | 4.0% |
| ESP | Mailgun | 15 | 2.9% |
| ESP | HDEMS | 14 | 2.7% |
| ESP | Salesforce Marketing Cloud | 13 | 2.5% |
| ESP | HubSpot | 12 | 2.3% |
| ESP | Zendesk | 11 | 2.1% |
TLD distribution (top 30 of 65)
Frequently asked questions
How many domains use Symantec MessageLabs?
521 domains in the Tranco top-1M use Symantec MessageLabs as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is Symantec MessageLabs's market share?
Symantec MessageLabs holds 0.08% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to Symantec MessageLabs?
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-09-24).
Largest mailbox providers in this category
Self-Hosted (22.56%) · Google Workspace (21.58%) · Microsoft 365 (17.03%) · Unknown / Other (6.68%) · Generic / unmatched (mx*.*) (2.53%) · Generic / unmatched (mail.*) (1.93%) · Proofpoint (1.86%) · Cloudflare Email Routing (1.76%) · Yandex 360 (1.67%) · Mimecast (1.47%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 521 domains.