Sherweb distributes what other companies build. Mailstinger builds what you resell.
Sherweb's job is to sit between Microsoft and you, taking margin. Their DMARC offering — whenever one shows up — is whichever partner they've signed this quarter, marked up. If you're an MSP and DMARC is something you want to actually own, buy it from the source.
Here's what Sherweb genuinely does well.
No false dichotomy. If these are deal-breakers for your context, they might be the right choice. We'd rather you buy the right tool than hate us in six months.
- Legitimately good M365 provisioning and billing tooling for MSPs — this is their actual product and they're competent at it.
- Strong Canadian and North-American channel presence; if your client lives in a regulated province, their compliance footprint matters.
- 24/7 support on the distributor side. For MSPs that don't want to hold Tier-1 for Microsoft, this is genuinely useful.
Capability by capability. Everything listed here is verifiable.
No hand-waving. If we claim a feature, it's shipped and you can test it free on the analyzer. If we claim a competitor doesn't have something, it's because their docs / pricing page / product tour say they don't.
Sherweb is good at what they do — distributing Microsoft and running channel support. DMARC isn't what they do. If you want a tool purpose-built for email authentication, bought directly from the team that writes it, Mailstinger is the shorter line.