Not receiving emails from gmail

Help and Support
1

Hi,

I’m currently trying to send emails from gmail (different gmail accounts) to mailsac but none of the emails were delivered properly.

In gmail, I received the following message:

"Delivery incomplete
(…)
The response from the remote server was:

421 Message to [email protected].[redacted].com temporarily deferred for 121 seconds, upgrade for better performance
"

Does anybody know what’s happening?

Thanks

2

Hi Betting,

The error message 421 Message to [email protected].[redacted].com temporarily deferred for 121 seconds, upgrade for better performance indicates that the email was temporarily deferred. This typically occurs when the sending rate exceeds the allowable limits for free or lower-tier accounts.

We receive a significant volume of mail from Gmail. For customers on the free tier sending to mailsac.com or custom domains configured with Mailsac MX records, throttling is more common. This is especially true when sending from shared services like Gmail.

To reduce the likelihood of throttling, I recommend considering one of our paid plans and using a custom domain. Our zero-setup custom sub-domain can be configured in just 30 seconds. Private domains have substantially higher receiving limits than the mailsac.com domain and are less likely to be deferred.

Let me know if you need further assistance with setting up a custom domain or selecting a plan.

3

Hi mjmayer,

It’s interesting that I’m using a paid plan with a custom domain (I’ve just redacted the domain in the example - @mailsac.qa.cd.id.[redacted].com - to avoid future issues in a public forum). But you can get the redacted part from my registered email.

So, is this something that the admin of the mailsac account (in my project) could change?

Thanks

4

Hi betting,

I found the domain you are referring to. I was unable to find any evidence of throttling on the domain. I looked generally at the domain and specifically for emails sent to [email protected].[redacted].com . I couldn’t find any evidence of mail delivered or attempted to be delivered to [email protected].[redacted].com. I looked at the past 3 days.

Can you provide a specific timeframe, including timezone, you received the 421 and the sending email address? Feel free to send me a direct message or open a ticket with [email protected] if you don’t want this information publicly visible.