So many site close...

[romingson]

I think many site can't use the gmail sign up or received and sent

[Darren Olander]

I've heard many sites are having issues with Gmail unfortunately. I think it is very important for sites to not keep sending to people who don't open or click mails... otherwise it looks a lot like spam if there is no interaction. At my sites we automatically stop sending mails to users who never read, so you are always sending to an active list. Sure, looks nice to be able to say "Mail to 100,000", but when that brings in only a few clicks that is just a marketing spin and not actual value.

[romingson]

So, just look like herculist receive many email but receive a few click only

[Benny Boss]

It is possible that many websites are unable to use Gmail services for sign up, received or sent messages. This is something that I can comprehend. It's possible that this is because of a problem with the site's compatibility with Gmail's services, or it could be due to some technical issues.

[ckoch]

herculist isn't really very good unless you upgrade.