Unexpected bounce results

[Central Designs]

Hi there

I've received unexpected bounce results on a campaign I sent out last night - of the 15,000 emails sent, I have received 12,000 hard bounce backs (Bad destination mailbox address).

I have checked these addresses with the E-mail verifier and it tells me that they are all valid addresses. These are SMTP addresses too (ie NOT aol, hotmail, etc.) so I can't understand why they have bounced back :?

Can anyone offer an explanation as to why this has happened?

Many thanks

 

[stanbusk]

There are servers that will respond an address is good despite it is bad, this is the reason why eMail Verifier only can catch around 70% of bad addresses, for the others you will get a bounce. There is very little to do here.

 

[Central Designs]

Hi Stanbusk

Thanks for getting back to me so quickly

I'm sorry, I don't quite understand how things work...

eMail Verifer is verifying that all these addresses are valid (the bounced emails accounted for about 80% of my mailing list).

This 80% of previously validated addresses have bounced back as bad... does that mean that eMail Verfier only accurately validated the remaining 20% of my list??

I'm confused as to whether these addresses are good or bad :?

 

[stanbusk]

No. It is explained here.

 

[Central Designs]

Thanks Stanbusk

I think the penny is dropping now, and I realise that my emails may be getting returned as spam - so nothing to do with the validity of the addresses at all.

I'm in the process of sorting this - thanks to your very useful information page - http://www.maxprog.com/site/support/us/mbm/avoiding_spam_flags.html

Thanks for your help