Most Hard bounces are from yahoo mail

[josephcvh]

Hi there,

I have just email out a list for my customers. We have provide DKIM keys for my customer to verified on their end.

Most of the hard bounces are from yahoo mail.

Anyone know the reason?

Thank you,
Joseph

 

[majid1f]

Do you use private smtp?
First check why you get hard bounces, error like this:

554 delivery error: dd Not a valid recipient - atlas207.free.mail.gq1.yahoo.com

mean that email doesn't exist.

smtp; 421 4.7.0 [TSS04] Messages from 195.201.... temporarily deferred due to user complaints - 4.16.55.1; see https://postmaster.verizonmedia.com/error-codes: retry timeout exceeded

Means you not process warm up, for some user click span button and you should wait and try again



Try register in yahoo FBL,
and fallow warm up process:

Warming Up an IP Address

Learn how to warmup your new dedicated IP address and why it's important.

sendgrid.com

 

[josephcvh]

Do you use private smtp?
First check why you get hard bounces, error like this:

554 delivery error: dd Not a valid recipient - atlas207.free.mail.gq1.yahoo.com

mean that email doesn't exist.

smtp; 421 4.7.0 [TSS04] Messages from 195.201.... temporarily deferred due to user complaints - 4.16.55.1; see https://postmaster.verizonmedia.com/error-codes: retry timeout exceeded

Means you not process warm up, for some user click span button and you should wait and try again



Try register in yahoo FBL,
and fallow warm up process:

Warming Up an IP Address

Learn how to warmup your new dedicated IP address and why it's important.

sendgrid.com

Hi @majid1f ,

I am using Amazon SES as my delivery server.

Most of the yahoo hard bounces are error like you mention:

 smtp; 554 delivery error: dd Not a valid recipient - atlas121.free.mail.ne1.yahoo.com

 smtp; 554 delivery error: dd Not a valid recipient - atlas124.free.mail.gq1.yahoo.com

 smtp; 554 delivery error: dd Not a valid recipient - atlas203.free.mail.bf1.yahoo.com

Before sending out the list, I have run a filter using DeBounce. But the results of these emails status are "Safe to send".

I wonder what else can I prevent this? As my Amazon SES bounce rate is now 6.7%.

Thank you,
Joseph

 

[majid1f]

Hi @majid1f ,

I am using Amazon SES as my delivery server.

Most of the yahoo hard bounces are error like you mention:

 smtp; 554 delivery error: dd Not a valid recipient - atlas121.free.mail.ne1.yahoo.com

 smtp; 554 delivery error: dd Not a valid recipient - atlas124.free.mail.gq1.yahoo.com

 smtp; 554 delivery error: dd Not a valid recipient - atlas203.free.mail.bf1.yahoo.com

Before sending out the list, I have run a filter using DeBounce. But the results of these emails status are "Safe to send".

I wonder what else can I prevent this? As my Amazon SES bounce rate is now 6.7%.

Thank you,
Joseph

It's obvious, emails are invalid,
For yohoo mail, try : thecheker, I had better result.