Mail errors · Gmail

What does “421 4.7.0 This message is suspicious due to the nature of the content or the links within” mean?

Gmail blocked the message because of what is in it or a link it carries.

Last read from the sources at the foot of this page.

Check my firm Read the steps
Gmail bounce
Mail Delivery Subsystem
421 4.7.0

This message is suspicious due to the nature of the content or the links within

As Gmail prints it.
01

What does it mean?

The block is about the content, not your domain's records.

02

What exactly does the source say?

421 4.7.0 This message is suspicious due to the nature of the content or the links within. To best protect our users from spam, the message has been blocked. For more information, go to Why has Gmail blocked my messages?

Gmail's page writes domain-name and ip-address where your bounce shows your own domain and the sending address.

03

Why would a small firm see it?

A link to a site with a poor record, a shortened link, an attachment type often used in scams, or wording that matches known scams.

04

How do I fix it?

  1. Read each link: it should point to your own domain or a site you know.
  2. Use the full address instead of a shortened link.
  3. Send the file as a link to your own document store if an attachment may be the cause.
Sources

Where does this come from?

Related
06 · Check my firm

See what is open before anyone else does.

We read from outside, find each way in first, and show it with a check anyone can re-run. No access, nothing tested, no obligation.

What we readPublic sources only
Who sees itYou alone
Delivery72 hours from confirmation
Meeting firstNone
Reading requestPrivate
Problem: Enter your firm's name.
Problem: Enter your name.
Problem: Enter a full address, like [email protected].
Problem: That does not look like a website. Try yourdomain.com.

A person reads every request. Your outside reading comes by email within 72 hours from [email protected]. Privacy