I have searched under several different terms but not found the solution....unless I missed it.

I have three XOOPS sites all with identical Mail Setup and all on the same server. However, one of the sites does not send confirmation e-mails to users who specify a gmail.com addy.

I've set up test accounts with the other two sites using the same address and the activation key comes through in an instant.

If anyone has any pointers I'd be most grateful.

Cheers.

I had the same problem and I realised that it was not any fault inside xoops, but the spam filter in gmail moved it in spam folder, likely you find there the lost confirmation e-mails.

Costas

You know what, I checked my server, XOOPS and all my spam and intrusion software settings and it never occurred to me that it was Google-side. All sorted now and I'm very grateful you replied. Cheers.