If I separated mine it would only be to break out and load balance Dovecot on it's own for performance. Even then it would just be one of many ways to go.

On 2021-10-15 10:15, Leandro Santiago via mailop wrote:
Hi list,

In which scenarios are there advantages on having IMAP and SMTP on
different IPs?

I've been managing small servers using Postfix for smtp and Dovecot
for mailbox, all in the same server using the same IP. But I'd like to
know how widely used this scenario is by others, especially more
experienced folks, and why.

What factors should affect such "splitting"? Performance, security ,
IP reputation or anything else?

I am mostly interested in office mail usage, but it's also interesting
to hear from other usages.

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