There’s been much debate whether a dedicated IP has advantages over a shared one when sending emails for years. If you regularly send multiple emails (for example, a newsletter or sales email), you may benefit from a dedicated mail server address. Capacities are always a given and the reputation of the IP, which has an influence on the transfer speed, is up to you.
But the argument for optimal resource capacities is rarely considered these days due to high performance possibilities of email servers these days. Unless you’re a power user with over 100,000 mails per year, sending emails via a shared IP is absolutely sufficient. In terms of reputation, the following applies:
- If you regularly (daily) send multiple messages (5,000+) with a low spam rating (below 0.1%), a dedicated IP address has a positive effect.
If a criterium does not apply, a dedicated IP may quickly pose a disadvantage compared to shared addresses in terms of reputation. Factors such as regular sending of mails and a low spam rating are central to the reputation score of the receiving servers.