CDONTS vs CDOSYS ... And Spam Filtering

[CouponPages]

I've been using CDONTS to send email from my web sites for quite a few years without any troubles. I use it for things like sending registration confirmation and forum notifications etc.

Lately I've been seeing some of my forum notifications ending up in Spam folders and in many cases being outright refused by the recipient's ISP.

Based upon my best research, it would seem that using CDONTS is the main reason for this problem. This may be due to the fact that the ASP pages send the messages directly without going through a full blown authenticatable mail server.

I've read quite a bit about CDOSYS as an alternative to the older CDONTS, but the differences are not clear enough to me. The main difference seems to be using an SMTP server address. In my case, my SMTP server is an external hosted email company (Tucows/OpenSRS), but oddly enough the rejected mail from the internal CDONTS ended up being bounced to the external postmaster/webmaster mailboxes.

Anyhow, can anyone comment on the differences and whether they feel that my problems with mail authentication will be eliminated using CDOSYS or some other method?

 

[pixl8r]

Well there is at least one reason to switch to CDO.

CDONTS is being deprecated. Newer servers (Windows 2003 Server and up) will not support it.

Very likely it will fix your problem, but one thing about spam folders is that sometimes it is actually the SMTP server that is being blocked and not your e-mail.

That said you might switch to CDO and still have the same problem. I would say it's a good idea to swtich to CDO now while you have the option.

Hope it helps!

Wow JT that almost looked like you knew what you were doing!