On 2024-06-08 15:42, James Knott via talk wrote:
> On 6/8/24 18:39, Val Kulkov via talk wrote:
>> TekSavvy doesn't block port 25, at least they don't on my static IP
>> addresses.
>
> Still, you want to use 465, which is SMTPS.
What if some other smtpd tries to deliver on 25 though?
465 would be good for the MUA (i.e. Thunderbird), but it doesn't seem
reliable to depend on all possible other smtpds to connect that way.
I provide StartTLS on port 25, and my observation is that most MTAs these days prefer SMTP over StartTLS rather than sending email over insecure SMTP. I do allow insecure SMTP for fringe cases of some super old MTAs. And yes, I provide SMTPS on port 465 too.