Re: [mailop] Sudden spike in Gmail failures ("TempFail – Spam")

[Sam Tuke via mailop]

On 29.04.24 20:28, Michael Peddemors via mailop wrote:

But this may be related to the drop in reputation of Amazon SES IP Space.


That sounds interesting - a drop in SES reputation across the board? Can 
you share more context or a link?

Sam.
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[mailop] Anyone From Microsoft That Can Give Some Guidance?

[Michael E. Weisel via mailop]

Hi fellow Mailopers, I hope you are all doing well.  We have a client of ours 
that works with the 107 Historically Black Colleges on a yearly project that 
awards grants for campus improvement projects.  The email list is small, around 
700 subscribers in total.  For the most part the emails are making it through 
however many of the schools rely on Office 365 for their email and some of the 
schools are having issues getting their mail to the inbox.  It’s a dedicated IP 
address and domain, and its setup for SPF/DKIM/DMARC etc. and they only send to 
this 100% opt-in list.  If there’s anyone on the list that may be able to help 
me out to?  It’s a great opportunity for these schools and some have missed out 
because they didn’t receive the communications and deadline information.  I’m 
happy to give more information on the client if someone could direct message me.

Thanks in advance and have a great day everyone,

Michael

Michael E. Weisel
CTO / Deliverability Lead
Gold Lasso
(301) 990-9857 Corporate
(240) 813-0174 Direct Dial

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Re: [mailop] Sudden spike in Gmail failures ("TempFail – Spam")

[Michael Peddemors via mailop]

On 2024-04-29 08:02, Mendel Kucharzeck via mailop wrote:

Hi,

During my last email campaign, I’ve encountered issues with gmail – and 
after investigating this for a few days, I cannot make heads or tails of 
the results. Maybe anyone can shed any light on what is happening.


Environment: Mailing list of around 150k subscribers, double opt-in. 
Using AWS SES for around 10 years to deliver emails. DKIM, SPF, DMARC 
and BIMI (with valid certificate) present. Custom MAIL-FROM domain set 
up on AWS SES (newsletter.syniumsoftware.com 
), sending mail address is 
newslet...@syniumsoftware.com . 
Sending pattern is irregular, I’m sending one newsletter every few months.


Timeline:

- A newsletter campaign on January, 18th was successful with high 
read-rates. DMARC and BIMI were not present during this campaign, but 
DKIM and SPF. MAIL FROM domain was amazonses.com
- Another newsletter campaign was send on March 15th, which was also 
successful. DMARC was present, but set to „none" in order receive 
reports. BIMI was absent. MAIL FROM domain was amazonses.com 

- The most recent campaign was send on April 26th with way lower (30-40% 
lower) read-rates. DMARC and BIMI were present, DMARC was set to 
„reject“. MAIL FROM domain was for the first time 
newsletter.syniumsoftware.com 


Commend you for updating your MAIL FROM, but you 'might' want to 
consider having a URL redirect from newsletter.syniumsoftware.com -> 
syniumsoftware.com, just for trust, transparency, and and confidence 
factors.


(http://newsletter.syniumsoftware.com cannot be reached)

But this may be related to the drop in reputation of Amazon SES IP 
Space.  Do they offer a dedicated outgoing IP Address that you can try? 
It also helps reduce any chance of forgeries.. Eg, smaller SPF 
footprint, that could have poisoned your reputation.






Findings:

- DMARC reports received indicate that validation was successful most of 
the time – the only problems were encountered when mail was forwarded 
and SPF was invalid because of the forwards (~1-2% of all mails)

- No unusual bounce or complaint rate through AWS SES notification service
- Read-rates (measured using litmus.com ) and hits on 
homepage were 30-40% lower than during past campaigns

- Unsubscribe rates were also 30-40% lower compared to past campaigns

- Our list contains around 40k subscribers using @gmail or @googlemail 
addresses – yet we’ve received around 70k entries in the DMARC report 
from google.com . I know that you might use a 
different domain for your gmail address, but a 30k difference seems 
incredible strange. I’ve verified that we did not send any duplicate 
emails using the AWS SES console.
- The google postmaster tools suddenly show a HUGE spike in rejects with 
the reason „TempFail – Spam“. Yet, the spam rate shown in the postmaster 
tools hover between 0 and 0,1% during this and the last campaigns (i.e. 
no spike).


Questions:

- Anyone else seeing this behaviour from gmail recently?
- Could the newly created, custom MAIL-FROM-domain cause a behaviour 
like this? The MAIL-FROM-Domain has not yet been used before, but the 
sending email address was the same



Any insights or hints on how to investigate this would be highly 
appreciated.


Thanks in advance.

Best,
Mendel

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Michael Peddemors, President/CEO LinuxMagic Inc.
Visit us at http://www.linuxmagic.com @linuxmagic
A Wizard IT Company - For More Info http://www.wizard.ca
"LinuxMagic" a Reg. TradeMark of Wizard Tower TechnoServices Ltd.

604-682-0300 Beautiful British Columbia, Canada

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[mailop] Sudden spike in Gmail failures ("TempFail – Spam")

[Mendel Kucharzeck via mailop]

Hi,

During my last email campaign, I’ve encountered issues with gmail – and after 
investigating this for a few days, I cannot make heads or tails of the results. 
Maybe anyone can shed any light on what is happening.

Environment: Mailing list of around 150k subscribers, double opt-in. Using AWS 
SES for around 10 years to deliver emails. DKIM, SPF, DMARC and BIMI (with 
valid certificate) present. Custom MAIL-FROM domain set up on AWS SES 
(newsletter.syniumsoftware.com ), 
sending mail address is newslet...@syniumsoftware.com 
. Sending pattern is irregular, I’m 
sending one newsletter every few months.

Timeline:

- A newsletter campaign on January, 18th was successful with high read-rates. 
DMARC and BIMI were not present during this campaign, but DKIM and SPF. MAIL 
FROM domain was amazonses.com
- Another newsletter campaign was send on March 15th, which was also 
successful. DMARC was present, but set to „none" in order receive reports. BIMI 
was absent. MAIL FROM domain was amazonses.com 
- The most recent campaign was send on April 26th with way lower (30-40% lower) 
read-rates. DMARC and BIMI were present, DMARC was set to „reject“. MAIL FROM 
domain was for the first time newsletter.syniumsoftware.com 


Findings:

- DMARC reports received indicate that validation was successful most of the 
time – the only problems were encountered when mail was forwarded and SPF was 
invalid because of the forwards (~1-2% of all mails)
- No unusual bounce or complaint rate through AWS SES notification service
- Read-rates (measured using litmus.com ) and hits on 
homepage were 30-40% lower than during past campaigns
- Unsubscribe rates were also 30-40% lower compared to past campaigns

- Our list contains around 40k subscribers using @gmail or @googlemail 
addresses – yet we’ve received around 70k entries in the DMARC report from 
google.com . I know that you might use a different domain 
for your gmail address, but a 30k difference seems incredible strange. I’ve 
verified that we did not send any duplicate emails using the AWS SES console.
- The google postmaster tools suddenly show a HUGE spike in rejects with the 
reason „TempFail – Spam“. Yet, the spam rate shown in the postmaster tools 
hover between 0 and 0,1% during this and the last campaigns (i.e. no spike).

Questions:

- Anyone else seeing this behaviour from gmail recently?
- Could the newly created, custom MAIL-FROM-domain cause a behaviour like this? 
The MAIL-FROM-Domain has not yet been used before, but the sending email 
address was the same


Any insights or hints on how to investigate this would be highly appreciated.

Thanks in advance.

Best,
Mendel___
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