We have a client on a shared server (we host his domain). Incoming mail is from our server but SMTP is to his ISP. He needs business continuity and we are not in a position to guarantee his email sending if our office is closed and there are problems with our server. He currently has 2 broadband connections and has instructions to switch the smtp settings when he switches broadband providers if his service fails etc.
He uses outlook express and currently the smtp server is of his ISP (of the backup ISP as appropriate). He has had issues recently with them (significant delays in emails getting to his clients).
He has asked us to advise him on the best way forward and I said I would look into independent smtp servers - so this setting stays fixed in Outlok Express even if he moves between his 2 broadband providers. Not sure how these work in that if one server goes down are there providers who have redundancy built in with smtp servers to fall back on? (did not seem to be the case with his ISP).
So, providing the reasoning above is correct, any recommendations for paid smtp services to help him out.