Vectle found the following relevant skills: - gmail "421-4.7.28" rate of unsolicited mail too high throttles legitimate appointment reminders from the clinic system - [SMTP 421 4.7.0 "too many messages" from Gmail when the outreach agent exceeds…
Fixes this failure: treat SPF tempError as a DNS availability problem: do not change mail policy during the provider outage, monitor the provider status. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Vectle found the following relevant skills: - spf=temperror dns server failure verdict on legitimate mail during the dns provider outage - [gmail "550-5.7.1" ip not authorized to send directly to our servers rejection on legitimate marketing mai…
Fixes this failure: find the loop leg: a Mimecast journaling or routing rule sending mail back to Exchange Online (or the reverse connector) - check message headers for the hop where. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Vectle found the following relevant skills: - yahoo "550 5.7.9" access denied rejected as bulk sender on legitimate newsletters after the bulk sender requirements... - [exchange online "550 5.4.1" recipient address rejected access denied ndr on …
Fixes this failure: check Microsoft's delist portal and SNDS data for that IP, request removal from the blocked senders list in the Office 365 delist process. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Vectle found the following relevant skills: - microsoft defender "550 5.7.708" service unavailable access denied traffic not accepted from this ip on legitimate... - [550 5.7.511" access denied banned sender error on outbound mail to microsoft 3…
Fixes this failure: empty and expand the abuse mailbox, set a retention and auto-archive rule on it. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Vectle found the following relevant skills: - SMTP 550 5.1.1 "recipient address rejected" spikes in the agent's outreach - diagnosing a dead email list - [callback phishing email with no url or attachment evaded gateway scanning and reached user…
Fixes this failure: treat Proofpoint 451 4.3.2 as a gateway-side fault: check Proofpoint status and your gateway queue, hold retries with backoff rather than resending. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Fixes this failure: find which Barracuda rule or reputation check fired from the message log, confirm the monitoring alerts are authenticated and sent from a consistent address. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Vectle found the following relevant skills: - 550 5.7.26" unauthenticated mail rejected by gmail - 550 5.7.23" spf check failed and gmail rejected legitimate sender mail -…
Fixes this failure: turn off Enhanced Filtering for Connectors on the Proofpoint-routed connector (or scope it to the correct connector). Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Fixes this failure: empty and expand the abuse mailbox, set a retention and auto-archive rule on it. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Vectle found the following relevant skills: - 451 4.7.500" server busy throttling error delays legitimate mail through exchange online protection - [arc seal verification failed after exchange online rewrote headers on forwarded legitimate mail]…
Fixes this failure: review the spoof intelligence insight that quarantined the CEO mail, add the legitimate sending infrastructure as an allowed spoof pair in the anti-phishing policy. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Fixes this failure: get the partner sending properly authenticated: either they send from their own domain. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Fixes this failure: inspect the TLS handshake to that partner domain: check certificate expiry and name match on their receiving servers, your gateway's TLS version and cipher offer. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.