I sent a campaign of ~ 100 emails but the campaign was blocked in the middle because ~ 5 emails were invalid*
What online tool would you recommend for mass testing campaign emails.
Is it something that will one day be integrated into acymailing
*Diagnostic-Code: smtp; 550xxx <ciation@xx>: Recipient address rejected: User unknown
550 5.1.1 <contact@xxx>:
Recipient address rejected: User unknown in virtual mailbox table
Diagnostic-Code: smtp; 552xxx user quota exceeded (UserSearch)
<jujumtp@xxx> (expanded from <contact@xxx>): host
eur.olc.protection.outlook.com[xxx] said: xxx Unfortunately,
messages from [xxx] weren't sent. Please contact your Internet
service provider since part of their network is on our block list (S3140).