# Net::SMTPServerBusy exception
**URL:** https://meta.discourse.org/t/net-smtpserverbusy-exception/264200
**Category:** Self-hosting
**Tags:** notifications, email
**Created:** [May 8, 2023, 5:39am UTC](https://meta.discourse.org/t/net-smtpserverbusy-exception/264200 "2023-05-08T05:39:50Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Hyan](https://meta.discourse.org/u/Hyan)
#### Post date: [May 8, 2023, 5:39am UTC](https://meta.discourse.org/t/net-smtpserverbusy-exception/264200/1 "2023-05-08T05:39:50Z")
I was trying to download website backups from /admin/backups and I cannot receive download emails. After checking production.log I found following output
```plaintext
Started PUT "/admin/backups/xxx.tar.gz" for 203.18.50.6 at 2023-05-08 05:34:50 +0000
Processing by Admin::BackupsController#email as */*
Parameters: {"id"=>"xxx.tar.gz"}
start
Rendered text template (Duration: 0.0ms | Allocations: 1)
Completed 200 OK in 658ms (Views: 3.7ms | ActiveRecord: 0.0ms | Allocations: 11718)
Rendered layouts/email_template.html.erb (Duration: 2.6ms | Allocations: 36)
Job exception: Net::SMTPServerBusy
fail
```
There’s also similar errors related to SMTP, such as below
```plaintext
start
Rendered user_notifications/digest.html.erb within layouts/email_template (Duration: 26.5ms | Allocations: 3067)
Rendered layout layouts/email_template.html.erb (Duration: 35.6ms | Allocations: 3335)
Rendered user_notifications/digest.text.erb (Duration: 19.6ms | Allocations: 2594)
Job exception: Net::SMTPServerBusy
Job exception: unexpected return
fail
```
The site was migrated from an old other site, and there’re many users email formatted as
**909471255bcde5900c628c6@email.invalid**
Can someone give me a clue what’s the cause of the issue and how can I resolve that?
---
### Author:  [@pfaffman](https://meta.discourse.org/u/pfaffman)
#### Post date: [May 8, 2023, 1:42pm UTC](https://meta.discourse.org/t/net-smtpserverbusy-exception/264200/2 "2023-05-08T13:42:44Z")
> [@Hyan](#):
>
> There’s also similar errors related to SMTP, such as below
Something is wrong with your smtp server. You’ll need to fix it.
> [@Hyan](#):
>
> The site was migrated from an old other site, and there’re many users email formatted as
> **909471255bcde5900c628c6@email.invalid**
Those users had invalid (perhaps empty) email addresses, so the import script created a bogus one. There’s not much you can do to fix that.
---
### Author:  [@Hyan](https://meta.discourse.org/u/Hyan)
#### Post date: [May 9, 2023, 3:01am UTC](https://meta.discourse.org/t/net-smtpserverbusy-exception/264200/3 "2023-05-09T03:01:45Z")
> [@pfaffman](#):
>
> Something is wrong with your smtp server. You’ll need to fix it.
Turns out it’s related to my SMTP server. After verifying it with ./discourse-doctor and resolved the SMTP errors. I can send emails now and those queued emails are sent as well.
Thanks your always help @pfaffman
---
### Author:  [@system](https://meta.discourse.org/u/system)
#### Post date: [June 8, 2023, 3:02am UTC](https://meta.discourse.org/t/net-smtpserverbusy-exception/264200/4 "2023-06-08T03:02:08Z")
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