Hello, > On 28/10/2025 4:20 pm, Robert B. Carleton wrote: > > [...] > > One of the sites I host is a non-profit with monthly meetings. There > > are around 50 members. Once a month, a announcement email is sent out. > > When it's sent out, it takes about a day for the queue to clear, > > because the MTA is immediately throttled for sending multiple emails > > per provider.
I'm running in a similar scenario, but with ~500 members and daily messages. Honestly, I ended up configuring the delays in the software we're using for sending mails (which is custom), but didn't had much problems otherwise, and I'm using fairly high chunks of mails being sent. > > I tried setting "smtp limit max-mails" to various values, but I'm > > still getting throttled. unfortunately I don't think this is doing what you hope. That knob is there to limit the number of mails per-session, it doesn't change the scheduling decisions. Joe Cook <[email protected]> wrote: > [...] > > My mail logs provided feedback from gmail on why it was being delayed. > Are you seeing anything in logs? > I was following email sender guidelines provided by gmail and it still > happened. > It may be worth reviewing any vendor guidelines to see how your system > matches up. > > Utilizing gmail Postmaster Tools may help understand what gmail thinks > of your server :) seconded! Cheers, Omar Polo
