Email Campaign Give Up after 99 delivery and 3 minutes

[David Ji]

Yesterday, we sent our first business email campaign to our 7770 targeted supermarket customers, however, after 99 email delivery and 3 minutes' sending, almost all 2500 email campain showed Give Up. Firstly, we checked with our email provider 163.com (Netease), they said that we had used up all 1000 email/day sending resources. Please see 1st attachment, they said: "After investigation, the topic of your email yesterday was: How to prohibit the bringing of pesticide residues into supermarkets and avoid the impact of pesticide residue exceeding standards on fresh supermarkets. Starting from 15:03, sending messages had failed. Sending messages that have failed will take up your link count. If you have configured a sending program, please check in a timely manner if it is the program that has been trying to send messages due to the failure." In the 2nd attachment of our marketing@riversmt.com's webview page, we found that almost 25% of our 99 sent email yesterday from was sending failure. Could you please tell me how to find those sending failure email before email sending? So, we can get rid of those emails before sending. In the 3rd attachment, you can see the campaign with 7770 supermarket list, it only acchieved 99 delivery with 25 bounces. In the 4th attachement, it showed that totally 2500 email tried to be sent. Could you please me the reason why 2500 email had been tried to send yesterday? In the 5th,6th,7th attachment, they showed that only the first 95 email was sent successfully in 3 minutes, then, all the rest 2405 emails showed Give UP. Do you know the reason why all these emails gave up? If there are really some emails with sending failure, can your system-Mailwizz help bypass these emails without sending those emails with sending failure again and again to waste about 901 (1000-99) email sending quota per day limited by Netease (163.com)? Do you know how to set these sending functions on which page? In the 8th and 9th attached, it showed that our delivery server is still active, and the sending quota is 200 per hour and 999 per day. Finally, could you please tell us how to change the sending quota to avoid the repeatedly sending emails with sending failure? And how to get rid to those emails with sending failure before sending? How to bypass those emails with sending failure, so we can continue to make full use of the 1000 email per day sending quota to sending other emails? Your early instruction will be highly appreciated!

 

[David Ji]

In fact, we have met 3 kinds of give up error in the above 5th, 6th, and 7th attached file: 1. only a few: Expected response code "250/251/252" but got code "550", with message "550 5.1.1 recipient is not exist .For more information, please visit https://feedback.qiye.163.com/stati...Af1d1UgpdcUsvIAYGHjU5dgl8bk8TWUciSBUIRAtZLwk3". 2. almost half of 2500 email: Expected response code "250" but got code "550", with message "550 5.7.0 DT:SPM .For more information, please visit https://feedback.qiye.163.com/stati...AfgVzXVtbcUsvIAYGHjVsLFMhOUoWX0chR0QHEQtZLwk3". 3. almost another half of 2500 email: Expected response code "250/251/252" but got code "550", with message "550 5.1.1 recipient is not exist .For more information, please visit https://feedback.qiye.163.com/stati...Af1d1UgpdcUsvIAYGHjU5dgl8bk8TWUciSBUIRAtZLwk3". Could you please tell me how to solve this issue in detail? As this problem blocks us to send further email campaign, your early instruction will be highly appreciated!

 

[David Ji]

Up to now, we still haven't got any feedback and support. Quite frustrated! We are really worried about our campaign! Could any one help answer my questions? In addition, we guess the reason that only 99 email had been delivered may be related to the SPF and DMARC value setting. Thus, we entered the SPF value and DMARC value in the 1st attachment with the SPF value and DMARC value from our Email provider (netease, 163.com) in the 2nd attachment. However, in the 2nd attachment, we have found only 1 default_domainkey is provided, how can we use this key to enter into the DKim public key and private key in the 1st attachment? Your early response and support will be highly appreciated!

 

[laurentiu]

Hello,

1. Stop Sending to Bad Emails​

Enable and properly configure Bounce Handling so MailWizz removes hard bounces:

• Go to Servers > Bounce Servers.
• Ensure you have a valid bounce server (IMAP or POP3, from your sending domain).
• Check that MailWizz's cron job for bounces is running every few minutes.
• After a bounce is received, MailWizz will:
  • Mark it as blacklisted.
  • Not retry that email in future campaigns.

2. Lower Sending Quota to Match NetEase Limits​

Go to:
Servers > Delivery Servers > Edit your server
Set:

• Hourly quota: 200 (as you already did)
• Daily quota: 999 (this is correct per NetEase)
• Pause after send: 1–2 seconds

3. Exclude Failed Emails from Future Sends​

MailWizz automatically marks emails as blacklisted but only if:

• Bounce server is working
• Bounce cron job runs properly

To check if bounce processing works:

• Go to Campaigns > Click on campaign overview button > Bounce Logs
• If it’s empty or not updated, bounce handling is broken

4. Disable Retry for Permanently Failed Emails​

In: Backend > Settings > Cron > Retry failed sendings set NO

Up to now, we still haven't got any feedback and support. Quite frustrated! We are really worried about our campaign! Could any one help answer my questions? In addition, we guess the reason that only 99 email had been delivered may be related to the SPF and DMARC value setting. Thus, we entered the SPF value and DMARC value in the 1st attachment with the SPF value and DMARC value from our Email provider (netease, 163.com) in the 2nd attachment. However, in the 2nd attachment, we have found only 1 default_domainkey is provided, how can we use this key to enter into the DKim public key and private key in the 1st attachment? Your early response and support will be highly appreciated!

Hello,
I reviewed your SPF, DKIM, and DMARC setup and can confirm:

• SPF is correctly set
• DKIM is correctly published in DNS
• DMARC is active and valid

Since you're sending emails via NetEase (163.com), they will sign your emails with their own DKIM key. Therefore, you do not need to fill in the DKIM public/private key fields in MailWizz — you can leave those fields empty.
Everything looks good on the DNS side.

Next steps: use MailWizz to send a test campaign to https://www.mail-tester.com and check your deliverability score.
Let me know if you'd like help interpreting those results.

 

[David Ji]

Dear Laurentiu, thank you very much for your detailed instruction. According to your instruction, we have checked every step that we have already done as follows: 1.1 Bounce Server of marketing@riverscrm.com is active. 1.2 Bounce Server of marketing@riverscrm.com is the same email as the delivery server. 1.3 Mailwizz's crop job for bounces on Windows Server has already been set and worked well. 1.4 Email Blacklist was acchieved on Jul. 30. 2. Delivery Server Setting of 2 Seconds for pause after send has been set according to your instruction. 3.1 Campaign overview, 3.2 & 3.3 Bounce log and Campaigns Bounce Logs on Jul. 30 worked well. 4.1 Retry Failed Sending is always on No. 5. SPF&DKIM has been set according Netease (163.com) and I have leaf the private and public key empty. 6. Mailwizz Junk Mail Test has got the score of Nine. Now, could you please tell me what we should do next step for the supermarket campaign with 7770 company & contact? Can we copy the campaign and send the same list with 7770 supermarket companies and kick off the campaign again next Monday? Your early instruction will be highly appreciated!

 

[David Ji]

Dear Laurentiu, as we still haven't got your instruction, we have decided to hold our second email campaign until we had got your further instruction. In addition, as our email provider, NetEase, insisted that MailWizz software we use in China continued to repeatedly send the emails to those email address with the sending failure on Jul. 30, 2025, which caused the 1000 email's sending resources per day to be used up. Could you please help check and double confirm that the setting of retry failed sendings No in 4.1 attachement in the above thread can really solve the issue mention by NetEase? Or in other place, you have other setting of retry failed sendings. Looking forward to your early instruction. Urgent!

 

[laurentiu]

Dear Laurentiu, as we still haven't got your instruction, we have decided to hold our second email campaign until we had got your further instruction. In addition, as our email provider, NetEase, insisted that MailWizz software we use in China continued to repeatedly send the emails to those email address with the sending failure on Jul. 30, 2025, which caused the 1000 email's sending resources per day to be used up. Could you please help check and double confirm that the setting of retry failed sendings No in 4.1 attachement in the above thread can really solve the issue mention by NetEase? Or in other place, you have other setting of retry failed sendings. Looking forward to your early instruction. Urgent!

As i can see from your pictures, retry failed sendings is set to NO.

NetEase, insisted that MailWizz software we use in China continued to repeatedly send the emails to those email address with the sending failure

You have only one campaign which send to that list?

 

[David Ji]

Yes, Laurentiu, Up to now, we only sent our first campaign with the 7770 Supermarket list on Jul. 30, 2025, and tried our best to solve the junk email issue before our next email campaign. We have uploaded another 3 lists: 1. fruit and vegetabble supermarket list with 14988 companies, and 2. 4619 Fruit chain store and 3. 2851 fruit&vegetable cooperation in the attachment. As long as we can successfully send our 7770 supermarket campaign email, we will continue to send the other 3 campaigns. Then, we can further uploaded other email lists. So what is your instruction for this 7770 supermarket email campaign? What should we do for the next step? Do you think we can copy this 7770 email campaign to a new email campaign with all 7770 email list or 7671 email list (7770 - 99 delivery)? Then, we can monitor the email sending result and make some adjustment further. What is your recommendation?

 

[David Ji]

Dear Laurentiu, Today, we kicked off our 2nd email campaign at 11:00A.M in China with 1 hour interval (in the 1st attachment). Could you please kindly tell me the meaning of Daily Sending Windows-start hour? Does it mean the first email's sending start hour (11:00A.M) just for the first day or the email campaign sending start hour for every day for this campaign? In addition, what is the meaning of Daily Sending Window-Interval? Does it mean that the email will stop sending for 1 hour after start hour of 11:00AM? I have found that we have only sent 34 emails from 11:00A.m to 12:00P.M (in the 2nd attachment). Then, after 12:00p.m the email stops sending. Will the email campaign restart at 1:00p.m for the 1 hour of Daily sending Window-interval? The sending speed is too slow for me. So I have changed 1 email per minute to 2 email per mintue, and have changed 60 email per hour to 120 email per hour (in the 3rd attachment). I don't whether and when this change will take effect. Your early instruction will be highly appreciated!

 

[David Ji]

Dear Laurentiu, it is quite strange that after 1 hour of email campaign sending, our email campaign stopped sending email. Is it because I have set the 1 hour of Daily sending window-interval? What are the meaning and usage of Daily Sending Window-start hour and Daily Sending Window-Interval?