[linux-audio-dev] web/smtp hosting suggestions wanted

folks on ardour-dev and jack-devel will be aware of the email nightmare i have faced over the last 4 weeks when it comes to using any sf.net hosted mailing lists. first, my existing ISP destroyed the SMTP configuration of the domain my email is sent to. then i registered linuxaudiosystems.com with jumpline.net, and it turns out that they too do not have their SMTP configuration correct. both situations mean that sf.net's use of exim3's SMTP callback system for verifying email sender addresses fail with either pbd(a)op.net or paul(a)linuxaudiosystems.com and i have been unable to send mail to any sf.net mailing list for more than a month. i am writing to see if anyone has any experience of any web/smtp hosting services that are (1) definitely configured to permit SMTP callbacks to work correctly (2) appropriately priced (i.e. cheap!) and (3) preferably handle domain transfers smoothly and efficiently. i've set reply-to so that replies come to me rather than the list. thanks for your input. --p