Am 03.07.25 um 12:26 schrieb Emre Üst via mailop:
Hello Admins,
Recently, our images in the emails we send to Gmail are being blocked with the 429 - Too Many Requests error. Does
Gmail have such a restriction? Or are we being blocked from where we actually host the images ?
Who is reporting this error to you? This is not clear from the image/text that
you posted.
It I understand correctly, you're hosting the images on a googleusercontent.com account, and their service apparently
responds with the cited "429 - Too Many Requests" error, at least in some situations. I don't know whether they enforce
some rate limit, whether that is dependent on your contract with Google, etc.
But this error can only happen when either the end user's MUA retrieves the image for display, or when some mail
handling software wants to have a peek at the images, for example to detect possible malware etc. I don't know whether
GMail would do that, though.
In the first case, the frequency of accesses to the images should be low enough to not matter - after all,
googleusercontent.com is supposed to be a kind of hosting services, and delivering the content should be the norm.
The second case might trigger some rate limit when you send to a huge number of GMail addresses, the GMail mail filter
wants to look at the images in each piece of e-mail, and the googleusercontent.com service does not realize that these
request come from GMail and should probably not counted against possible limits.
Since both services (image hosting and mailbox handling) are provided by Google, although likely different departments,
I suggest that asking Google themselves is likely to yield reliable answers. If you use their facilities for content
hosting, I suppose you have a contract which includes some form of support, and that's where I'd direct this question first.
Cheers,
Hans-Martin
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