There is a form you fill with your broker on how you want to receive your dividends. I don't know if MPesa is a universal option but you can do through your bank. That is universal.

for me i prefer cheques i hadnt registered for safaricom mpesa option but since they have our details mpesa ikaanza kuingia by force

For amounts below certain limits, Safaricom pays by MPESA regardless of what your broker form says.
C&R is also known to call to convince investors to take MPESA option despite what the broker form says.
Once after I received such a call, I redirected them to my broker form yet again, I prefer EFTs.

No limit on the floor and roof.

If I am not wrong, it's 35k. Anything above 35k is EFT, below you can have MPESA or EFT.

I receive dividends in a savings account. By bank doesn't charge transaction fees for the savings account.

Mpesa limit is ksh.70k or as set by the company paying the dividend.
Some have set at ksh.10k as maximum by mpesa

Didn't you say "No limit on the floor and roof."

A bank teller is the worst person to ask that question. Talk to your broker.

Thanks @Ericsson.
I think we can safely conclude that for all other counters, EFT as prefeered choice of the investor is always respected. It is ONLY Safaricom that at times force people to remit their dividend by MPESA irrespective of their choice of EFT transfer .
This is important to me because as a foreign non resident investor , I don't have MPESA , the only option is bank transfer by EFT. So MPESA is not an option for me.
I do have Safaricom shares and they have been paying by EFT. But I have reduced my holdings by half due to lack lustre performance of Safaricom as per their HY 2022 results to seek opportunities in other counters like SCBK , NCBA and ABSA with a view to a better dividend income in the short term than Safaricom.